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The massive Fatigue Carousel helps keep roads safe

  • Publicado em 22 Mai 2022
  • The "accelerated pavement testing facility" in Nantes can simulate decades of road traffic in a few months. Here's how. ■ More information: lames.univ-gustave-eiffel.fr/...
    Editor: Dave Stevenson davestevenson.co.uk
    Camera: Guillaume Juin www.guillaumejuin.fr
    Producer: Axel Zeiliger at Block8 block8production.com
    Thanks to Jérémie Chabot for the suggestion
    I'm at tomscott.com
    on Twitter at tomscott
    on Facebook at tomscott
    and on Instagram as tomscottgo

Comentários • 3 992

  • Tom Scott
    Tom Scott  4 meses atrás +4492

    I really hope the scale of this comes across on camera. Drone shots would have been wonderful, but unfortunately the Carousel is just a couple of kilometres away from an airport!

    • Thunder_Mouse_2014
      Thunder_Mouse_2014 18 dias atrás

      Absolutely, when that arm is on the approach arc, eesh, you can see the speed. To feel the wind would be something, too.
      Maybe one of your followers is savvy at maths and can calculate the g-forces at the end of the arm? That would be interesting.
      Be well, sir. We need you out there enriching our lives.

    • The Golden TNT
      The Golden TNT 22 dias atrás +1

      @Epi I feel he gets contacted by people working in strange fields or facilities and they ask if he would be interested in doing a segment there.

    • Siddharth Shekhar
      Siddharth Shekhar Mês atrás

      You were really scared ,Tom. But I would have been too. 🙂

    • Jul W
      Jul W Mês atrás

      @Dru Nature No, he won't. He said multiple times that his videos should be concise, short, and give a quick overview of the topic

    • Jul W
      Jul W Mês atrás

      @Shawn Hartmann Huh what?

  • Voltaic Fire
    Voltaic Fire 4 meses atrás +6986

    "A fatigue carousel" is a great way of describing a really exhausting week and that's exactly what I'm going to start calling it.

    • weggles91
      weggles91 28 dias atrás

      Fatigue carousel... commonly known as "life".

    • Coro
      Coro Mês atrás

      "Hey, how's it going?"
      "Oh, I'm just riding the fatigue carousel this week 😮‍💨"

    • Matty England
      Matty England Mês atrás

      @Kelly Alvarado oy vey

    • Alan rettig
      Alan rettig Mês atrás

      This genuinely made me smile

    • Jason B
      Jason B 2 meses atrás

      Oh great point, I like that.

    MAN_ON_WHEELZ 4 meses atrás +901

    I actually was just wondering about how civil engineers/scientists know what kind of abuse a road can take and how to measure lifespan of a road. Tom... always answering questions I never thought I'd get an answer to.

    • M Oa
      M Oa Mês atrás

      Mostly, there are set designs and specifications for road construction. There are many factors however that will effect the lifespan including the substrate that the road is built on etc. However the apparatus shown in this video will mostly be used for novel designs of road surface construction, for future development.

    • never lift
      never lift Mês atrás +1

      california bearing ratios, relative densities, ESAs, drainage

    • KrazyKiwi
      KrazyKiwi Mês atrás

      Haven't figured that out in New Zealand yet, we use trucks going half the speed limit that will be set instead which does absolutely nothing (though our new road lasted about 2-3 months longer then expected recently, large step!)

    • Psychotropni Lachtan
      Psychotropni Lachtan 3 meses atrás +4

      Psychotropni Lachtan
      před 1 sekundou
      They take a wild guess. Most of these companies get liquidated after a while just so nobody can hold them accountable when it starts falling apart. And politicians are more than happy to secure new contracts for their buddies in construction bussiness so its not a big deal. Everyone wins, except the tax payers ofcourse.

    • Termitreter
      Termitreter 3 meses atrás +19

      A lot of it is also just decades or centuries of experience. As the guy said, you cant speed up things like the asphalt deteriorating over time.

  • Synjd Crispy
    Synjd Crispy 3 meses atrás +319

    This covers something I deal with at work ALL the time. Management is always looking to do things more cost effectively, which makes complete sense, but they are convinced that everything can be analyzed on computers, eliminating the need to expensive real world tests. They actually asked the engineers "what additional modeling and simulation tools/packages do you need to eliminate testing?" It's mind melting trying to explain things to them when they have tunnel-vision on eliminating a large budget item.
    No matter how sophisticated and detailed your models are, there are always assumptions that need to be made in building them. You need that physical data to actually show the models are giving the correct results, and if not, make fixes/corrections/adjustments to the models to have them line up. You do this up front, the models can save tons of money and time down the line.

    • M Mumau
      M Mumau 6 dias atrás

      Because of managements decisions in overriding the engineers, we have seven high schools named after astronauts. It's been a theme in business for many decades. $hortcuts

    • HandigeHarrie
      HandigeHarrie 18 dias atrás +2

      I always say to my boss in this situation: Who is testing the automated tests? Who validates their results are what it is in real life use cases?

    • Полиграфович
      Полиграфович 25 dias atrás +1

      That didn't matter through the pandemic at all. It's the way it is. Trust the models, trust the science bro.

    • Motero Argentino
      Motero Argentino Mês atrás +4

      Yes, models were never meant to eliminate real testing, just reduce it.

    • J D
      J D Mês atrás +18

      Wait until they have some expensive real world rework that occurs because they didn't build a prototype, then for the next 5 years or so it'll be all "test everything simulations aren't enough" until the memory of that fades and they go back to "simulate everything we don't need prototypes" repeat ad infimum. Where I work we call these revolving management/corporate pushes the "flavor of the month" 😅

  • Baryonyx Walkeri
    Baryonyx Walkeri 4 meses atrás +404

    I do wonder, how many wheels does this facility go through during a testing cycle?

    • Lynx Antarcticus
      Lynx Antarcticus 28 dias atrás +1

      @Leonard Tubbs I think they can also run much more worn tires than what you can run on an actual car since it's not really a safety issue.

    • Leonard Tubbs
      Leonard Tubbs Mês atrás

      figure 60k Km as the AVERAGE length of life for a low quality road tire (cant really see them using expensive tires).. running 70kph .. roughly 860 hours or just shy of 36 days of life for the tire....

    • Dr. Spatula
      Dr. Spatula Mês atrás

      These kinds of tires are replyed and last a significant amount of time so not as many a you think

    • Andrew Tidrick
      Andrew Tidrick Mês atrás +4

      So an average drive tires like they have on the arms there can see up to 50,000 miles (80,000 km). The engineer stated they usually run at 70 km/h which translates to about 47 days worth of travel before they hit that 50k m or 80k km mark. So about every month and a half of testing they have to swap out tires, possibly more often since they're under constant strain and not fluctuating stress.

    • TheGravygun
      TheGravygun 2 meses atrás +1

      They got 20 ply tires ?

  • Pacifico Studios
    Pacifico Studios 4 meses atrás +90

    When I worked for Minnesota Dept. of Transportation, the Research Dept. was proud of establishing a test site on a real piece of freeway with real traffic. This machine gets data a lot faster than that.

    • Cookiedible
      Cookiedible 19 dias atrás +1

      @GoombaGenocide as he said, this specific one is 40 years old already. It's had time to make billions of return on investment.

    • Sam
      Sam Mês atrás +4

      Except the Minnesota machine actually tests freeze thaw cycles and this machine does not.

    • ⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻ ⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻
      ⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻ ⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻⸻ Mês atrás +1

      @GoombaGenocide hardly a million... its a simple machine that rotates and it has a few sensors only... operation is just the price of electricity which is cheaper than gas and the staff plus a bit of maintenance. do you have any idea how much money goes into just the raw materials of a road without even counting the labor, planning and cost of the land rights?

    • GoombaGenocide
      GoombaGenocide 3 meses atrás +1

      @FurnitureFan in the long term for a large area maybe, but I imagine this machine cost millions of dollars to design build and operate

    • FurnitureFan
      FurnitureFan 3 meses atrás +8

      Right, the fatigue carousel must save a great deal of public money by identifying the most durable materials beforehand.

  • Pup64HCP
    Pup64HCP 4 meses atrás +12189

    Tom Scott: always pointing out things I didn't know existed but now that I think of them they make perfect sense

    • Robbie James
      Robbie James 3 meses atrás +1

      What about it do you think is overengineered? Given the forces it needs to apply and withstand over long periods of time, it seems to be very sensibly designed to me.

    • MUZKF47
      MUZKF47 3 meses atrás

      Looks like pointless over engineering

    • Nenrikido
      Nenrikido 4 meses atrás

      @Robbie James not really, we're used to it, and im sure most countries do sth similar

    • Robbie James
      Robbie James 4 meses atrás

      damn! that's harsh.

    • WhaTsApChat±①⑥③⑥⑥⑦④⑨④⑦①
      WhaTsApChat±①⑥③⑥⑥⑦④⑨④⑦① 4 meses atrás

      👆👆👆For investing guidelines🚀🚀....

  • Goat-on-a-Stick
    Goat-on-a-Stick 4 meses atrás +674

    You have a knack for finding the most interesting stuff!

    • brot und wasser
      brot und wasser 2 meses atrás

      @Clarke Corvo okay.

    • Clarke Corvo
      Clarke Corvo 2 meses atrás +1

      @brot und wasser pff.. 520. get on my level, kid.

    • brot und wasser
      brot und wasser 3 meses atrás

      500th like

    • Mike Fowler
      Mike Fowler 3 meses atrás +2

      I think Tom's special skill is taking otherwise mundane things and making them very interesting.

    • sang vo ba
      sang vo ba 3 meses atrás


  • Can Sabancı
    Can Sabancı 4 meses atrás +52

    4:37 - as an aerospace engineer I totally agree with that. there are aerodynamics analysis tools called CFD - computational fluid dynamics. but my professors used to call them colorful fluid dynamics (bc they give you nice colorful contour images as results :D). because the chaos theory applies to fluid dynamics, minor changes in the initial conditions can cause massive differences. therefore you can only trust them *a little* after you validate its results with real test data by changing some parameters in the tool.

  • drb0mb
    drb0mb 2 meses atrás +17

    I'm glad you addressed the fact that weather and temperature cycles are absent from this testing, because it's a glaringly significant contributor to road wear. People who don't live in a place that experiences all four seasons don't know the misery of potholes in spring followed by repair in summer.

    • George
      George Mês atrás +1

      Sure they do if they have Chinese pavement

  • Crimson miner
    Crimson miner 2 meses atrás +18

    This dude talking about his machine in a succinct way with pride is just wholesome and informative.

  • Graham
    Graham 4 meses atrás +2135

    One of the mysteries in life - how does Tom Scott find all these niche things that you never knew about - but sort of make sense when you hear about them!

    • TheArklyte
      TheArklyte 2 meses atrás +1

      He reads his email.

    • Ian
      Ian 4 meses atrás

      @James ROFL nice troll there James.

    • Enthusiastic Zestful Villainy
      Enthusiastic Zestful Villainy 4 meses atrás +14

      @James citations needed

    • James
      James 4 meses atrás +23

      @James unless you've got some examples... your statement is factually inaccurate

    • RAD
      RAD 4 meses atrás

      Atlas Obscura

  • Nalehw
    Nalehw 3 meses atrás +70

    I hope Tom remembers to gets his cameras back when the testing finishes in a few months.

  • Bertil Hatt
    Bertil Hatt 4 meses atrás +26

    I feel like they could have a similar carrousel indoors with cooling coils to simulate freezing conditions, and ice/thaw cycles.

  • Ring Andpinion
    Ring Andpinion 3 meses atrás +12

    Hats off to the engineer, his presentation was very informative.

  • SpecterX
    SpecterX 3 meses atrás +7

    This guy can make testing pavement interesting. That’s how you know he’s done a good job at this

  • Zukaro Travon
    Zukaro Travon 4 meses atrás +1870

    The fatigue carousel is what I'm calling my internship from now on.

    • nullplan01
      nullplan01 4 meses atrás

      Change your perspective: You are not running in circles! It's a downward spiral.

    • Nullvalue
      Nullvalue 4 meses atrás

      The same term applies to any job with a crappy boss.

    • General Kenobi
      General Kenobi 4 meses atrás


    • The Real Plato
      The Real Plato 4 meses atrás

      read that as `relationship`

    • Socky Noob
      Socky Noob 4 meses atrás


  • snowfelon
    snowfelon 2 meses atrás +4

    Wow this is incredible... I've never given much thought as to how materials are tested for durability. Fascinating! And that thing is really intimidating 😂

  • 코코
    코코 3 meses atrás +7

    I actually live in Nantes and didn't know this carousel existed. It's great to learn something new !

  • tp
    tp 4 meses atrás +43

    Tom: “Roads need to last decades
    French highways agency: “les routes doivent durer des siècles!”
    UK highways agency: “Roads need to last 5 minutes”

    • Cookiedible
      Cookiedible 19 dias atrás +1

      @FurnitureFan French roads have speed limits as welk

    • SirBojo4
      SirBojo4 3 meses atrás

      Montreal in a permanent state of maintenance

    • zazak972
      zazak972 3 meses atrás +1

      And there is Quebec....

    • Mecha-Sheep
      Mecha-Sheep 3 meses atrás +1

      Well, they don't last centuries. Those are not roman roads. Some roads are remade every few years (highway and heavy duty roads). Cars are not a problem, but as soon as you have heavy trucks on a regular basis, roads end up damaged very, very fast.
      This cost a lot of money, and is one of the reason I hate those trucks and loves trains.

    • BMC
      BMC 3 meses atrás +20

      Belgium: "you guys maintain roads?"

  • Matt Flamand
    Matt Flamand 4 meses atrás +4

    This was a really cool video. You always do such a good job putting these together. Cheers

  • Oscar Gill
    Oscar Gill 4 meses atrás +2609

    Two fascinating things I learned from this video:
    1. There are things called fatigue carousels responsible for testing roads
    2. There are windproof mics

    • Luke Royle
      Luke Royle 2 meses atrás

      @Carl Gunderson tell that to spf50+ sunscreen. It makes the device more windproof. cancelling the wind entirely isnt possible

    • Carter Milan
      Carter Milan 3 meses atrás +3

      @Michael Scott-Joynt in those cases, it's more likely that the crew didn't prepare for a windy scene and/or didn't have access to a windscreen than them not being aware that they exist. it's extremely common for shotgun and lavalier mics to use windscreens.

    • Michael Scott-Joynt
      Michael Scott-Joynt 3 meses atrás +1

      @Luke Royle The way I read it, the person is surprised to watch a video like this which isn't ruined by wind noise, even though there's simple technology to address it. Most of us have probably lost count how many random videos we've seen where the creator acknowledges and apologizes for wind noise, but has nothing more to do about it. In just about every case, the creator shrugs it off as if they can do nothing about it. Seems more awareness is needed.

    • 1 million subs without a video challenge
      1 million subs without a video challenge 3 meses atrás +2

      Haha ! I knew windproof mics existed because I've seen reporters standing outside during a huricane trying to film a short segment.

    • Luke Royle
      Luke Royle 3 meses atrás +18

      Most mics you see are designed to be "windproof" to some extend, with rough /fuzzy surfaces surrounding the membrane to dampen any air vibrations that aren't sound. The "windproof" mic he's talking about is just a regular clip mic with a small sponge to act as a windscreen, like a "pop filter" but all around the mic rather than in one direction.

  • SRT Amplification
    SRT Amplification 3 meses atrás +2

    Looks like this could also be used to test the lifespan of different tires as well.

  • Annantrow
    Annantrow 3 meses atrás +20

    Makes me wonder how much additional ware comes from acceleration, deceleration, and the tires putting power to the ground rather than just rolling.

    • zach moyer
      zach moyer 3 meses atrás +3

      @Colorado Strong you ever hear the phrase pick your battles

    • Colorado Strong
      Colorado Strong 3 meses atrás

      @zach moyer _Alot_ is a town in India. _A lot_ is more than one of something.

    • zach moyer
      zach moyer 3 meses atrás +2

      in a state with heavy trucking its alot extra most trucks stay in the right lane and its like driving over constant speed bumps get in the left and its smooth sailing.

  • Louie McEwan
    Louie McEwan 4 meses atrás +1

    Thanks again Tom Scott! Again something I never new existed, and yet is quite fascinating. I really appreciate these videos

  • macforme
    macforme Mês atrás +1

    They can help pay for the facility by charging tire companies to test their tires on this machine. Thanks,Tom, for bring us info on stuff we didn't know existed but is always fascinating.

  • Magmafrost13
    Magmafrost13 4 meses atrás +2228

    I want not prepared for how utterly terrifying this machine is, even through a video. I think the scale really does come across on camera here (I imagine that shot of how much it squashed the wheel at the start of the video really helped sell the weight of it), its scary just to watch, I cant imagine standing next to it

    • ESSBrew
      ESSBrew 3 meses atrás

      Its ok, we will be ok.

    • FurnitureFan
      FurnitureFan 3 meses atrás +1

      @longshot7601 I love that idea. I once took a flight to a small island where they weighed each passenger before assigning us seats. Plus we got rearranged after the plane unloaded some freight on each island.

    • Ken Norcott
      Ken Norcott 4 meses atrás +2

      @Thomas Payne it is a large machine moving extremely heavy weights at high speed. I’ve worked on machines very similar to these, and I fear them for a reason. It’s not like a truck or Covid (not sure where your logic is on that) the forces these machines withstand is far greater than anything like that.

    • Thomas Payne
      Thomas Payne 4 meses atrás +4

      If you find this machine "utterly terrifying" then you must have been absolutely petrified when scientists told you about covid and cancer. How are you coping with the constant threat of nuclear war and terror1st attacks? You should definately avoid beaches in case you see a sand castle or seagull and faint. It's also probably best to avoid theme parks, trucks, cars, planes, ships and tractors...just avoid roads altogether that way you won't be terrified all the time.

    • Dr. Skillz
      Dr. Skillz 4 meses atrás +4

      Meh. It wasn't that terrifying. Y'all are feeble.

  • Hakar Doski
    Hakar Doski 2 meses atrás +9

    large machines have always been frightening for me, and seeing them move at drastic speeds is absolutely terrifying.

  • Michael John
    Michael John 4 meses atrás +3

    I've often wondered how they do accelerated tests of road surfaces. And now I know!

  • TeddyTuned
    TeddyTuned 28 dias atrás

    I would love to know the calculations on that fence. The heaviest part of the machine is above the height of the fence and I can’t imagine it would stop the force of that machine in a catastrophic disaster.

  • Magical Capi
    Magical Capi 4 meses atrás +9

    "this spins terrifyingly fast"
    *says while posing with a smile and a thumbs up in front of the deadly machine*
    yup, that's our Tom

  • Lighter Microbe
    Lighter Microbe 4 meses atrás +3544

    That carousel is ablsoulty terrifying, I'm going to have vaguely infrastructure-themed dreams for weeks, Thanks Tom! 10/10 would show to friends and family :)

    • JP Abcede
      JP Abcede 3 meses atrás

      @Paul Lowell In the middle of a pandemic, I'll pass.

    • Paul Lowell
      Paul Lowell 4 meses atrás +1

      You need to get out more

    • Dan Quayles ITS SPELT POTATOE!
      Dan Quayles ITS SPELT POTATOE! 4 meses atrás

      @Martin Finnerup Because i watched the video! Maybe you should!
      And charging cars by the road is a stupid idea! Try thinking about it!

    • Sample Text
      Sample Text 4 meses atrás

      Imagine trying to cross the road while that thing is running

    • Martin Finnerup
      Martin Finnerup 4 meses atrás

      @Dan Quayles ITS SPELT POTATOE! Not sure you meant to post that in this thread?
      Also, why?

  • Rob Weckert
    Rob Weckert 4 meses atrás +1

    Another amazing report, Tom. Love your work

  •  2 meses atrás

    I’m grateful I found one of your videos on my recommendation. It was the roller coaster one due to the fact that I went to an amusement park. Now I just watch all these interesting videos because I love learning all these things that I never know existed. The world is really fascinating. 🙏🏽

  • artisanrox
    artisanrox 3 meses atrás +1

    This is the coolest thing I never knew existed. And also smart considering the cost of infrastructure projects.

  • Fred Yellowsnow
    Fred Yellowsnow 4 meses atrás +1

    Pity such accelerated testing wasn't done on many of Britain's m-way material and road structures. I recall vividly the joys of avoiding the ruts worn into the inside lanes of the M1 and M6 in long stretches. Dangerous stuff, some of it.

  • Anime Fan
    Anime Fan 4 meses atrás +1799

    I love stress tests that actually use these cool practical tests instead of some math along with tiny test samples. There’s a reason for both, but seeing the test in action is just a lot more fun.

    • FurnitureFan
      FurnitureFan 3 meses atrás

      @Tim D Hey, thanks for that info.

    • MonkeyJedi99
      MonkeyJedi99 4 meses atrás +2

      @Dezgesh I really loved and was bothered by an episode of How It's Made where they showed the machine that stress tests a new piano movement by rapidly and repeatedly running all of the keys through a rising chromatic scale.
      Loud, but hypnotizing.

    • MonkeyJedi99
      MonkeyJedi99 4 meses atrás +1

      @Tim D The question was not, "are my tires already wear tested or not?" it was, "Can a rig like this be used to wear test new tire construction methods?"

    • MonkeyJedi99
      MonkeyJedi99 4 meses atrás +2

      Other fun ones include machines that simulate mattress and cushion use by repeated simulated sitting, and that one college project where they tested how many (simulated) licks it REALLY took to get to the center of a tootsie pop.

    • j Walster
      j Walster 4 meses atrás +2

      @Simon Zerafathey also have ways of testing tire slip angle on F1 carsm

  • Benjamin Baugnies
    Benjamin Baugnies Mês atrás

    I love how the researcher is calmly explaining everything and then it cuts back to Tom terrified of the gigantic metal robot arms rushing past him.

  • Xanderqwerty123
    Xanderqwerty123 4 meses atrás +13

    Unfortunately this wont test years of weather erosion, but it is still absolutely fascinating

  • Pete Beatminister
    Pete Beatminister 3 meses atrás

    A amazing machine, I never heard of that before. Thanks for showing.

  • Nani Ruja
    Nani Ruja Mês atrás

    I read about this for my bachelor's degree thesis on dynamic analysis of pavement... at the time I really needed some real life data from the test for FEA modeling of pavement cross sections. Am glad I came across this video... brings back memories. Btw I'm from India and it was all far from reach then, and still is from what I believe.

  • spoopy poods
    spoopy poods 4 meses atrás +1791

    1:21 “Suspension compression” and “Thermoplongeurs” are exactly the kind of buttons I expect to find in a fatigue carousel

    • sageinit
      sageinit 2 meses atrás

      @jBurn! Indeed

    • giang tran
      giang tran 3 meses atrás


    • jBurn!
      jBurn! 3 meses atrás +4

      this control panel looks like the LabView standard Frontpanel

    • Name Name
      Name Name 4 meses atrás +14

      @Dood Uhm ackchually it's "compresseurs suspensions".

    • Boss Pods
      Boss Pods 4 meses atrás +23

      Also “lubrification” and “marche”

  • John Arnold
    John Arnold 3 meses atrás

    That's all well and fine as long as the road builders do everything to the same specifications without cheating. This thing also doesn't simulate the bouncing of heavy trucks that has a severe affect on roads.

  • Revolutionary Prepper
    Revolutionary Prepper 29 dias atrás

    It's good that France has decided to do this. It gives them, and idea of how long roads will hold up, under certain conditions. We should do something like that here in the U.S.

  • Arkaïd
    Arkaïd 4 meses atrás +4

    Damn I used to live next to this monster and I had no idea it existed. I even did my driving license test 100m from there. So weird to think this thing is running continuously

  • Sam Jones
    Sam Jones 3 meses atrás +1

    Does the rate of tire change match that of the simulated number of tyres a road would come into contact with over say, a 10 year period?

  • Ashley Neal
    Ashley Neal 4 meses atrás +3085

    Driving is my profession and I didn't have a clue about these machines. Mind blown as normal Tom 👊

    • Poodz
      Poodz 3 meses atrás

      @greatleapforwards this would be fantastic

    • FurnitureFan
      FurnitureFan 3 meses atrás +1

      @TheSphongleface How do you get your deliveries, by carrier pigeon?

    • TheSphongleface
      TheSphongleface 4 meses atrás

      Driving all day is just lazy

    • pennsred
      pennsred 4 meses atrás

      You’re welcome

    • Shrek Junior v2
      Shrek Junior v2 4 meses atrás

      @Jacob Kudrowich Straight fax bruh, on God, like this kid think we care about his worthless life 💀💀💀

  • Taylor K
    Taylor K 2 meses atrás

    Lifecycle testing is very cool. I worked in automotive and the butt robots were some of my favorite, not what I was building but always made me laugh. Also worked at Xbox and we built both button and body lifecycle testers for the buttons and the body. The button masher and the rage quit simulator.

  • Anshka
    Anshka 4 meses atrás +1

    I love your videos. This is random (par for the course) and really caught my imagination. Thanks dude.

  • Nickersons Theme
    Nickersons Theme Mês atrás +1

    Maybe it's just me, but I'm really surprised by how close he is standing beside it

  • John Daniel
    John Daniel Mês atrás

    This is how I feel when I stand next to one of those scramble rides at the fair, always thinking it's gonna send a car right at me.

  • balaclava351
    balaclava351 4 meses atrás +2303

    Can we take a moment to appreciate how well this guy was able to communicate this in a second language. Amazing.

    • Australian Anarchist
      Australian Anarchist Mês atrás

      @wu1ming9shi English is the single best language in those terms, based on the amount of unique ideas we can express. Thanks Greeks!
      English speakers are also some of the most readily word-borrowing. Why have a new word for taking delight in the pain of others when we can just use Schadenfreude?

    • wu1ming9shi
      wu1ming9shi Mês atrás

      @Australian Anarchist Becaue while english makes people communicate with one another, it is not a perfect language. There are certain things that you simply cannot express in english because it either does not exist or you have to use a lot of extra wordyness to explain what you are trying to say.

    • Fich
      Fich Mês atrás

      Being a frenchman at that even. The french are notorius for not learning any other languages than, well french.

    • MDTransmissionSpecialties
      MDTransmissionSpecialties Mês atrás


    • Jul W
      Jul W Mês atrás

      @I Tell You For Free Exactly. In university, literally everyone speaks English. Every person I know from university almost speak a flawless English, because you have to use it so often

  • Grape
    Grape 3 meses atrás

    I just moved to the Philippines and can't believe how good the roads are. You can literally drive all day and not see a pothole. Most of the roads are concrete, beyond that I dont know anything about them...but theyre great.

  • ESSBrew
    ESSBrew 3 meses atrás

    Thats amazing, I wishI knew where the other facilities were, and where major countries like America test them. Im assuming UK tests here in France, but even that wasnt obvious in the video. Very very curious.

  • dmaster225
    dmaster225 3 meses atrás +1

    They need those here in the US. Freaking roads break up in a year or two!

  • Ralph111417
    Ralph111417 2 meses atrás

    Don't blame you for feeling uncomfortable standing there. I mean, I felt uncomfortable just watching the video!
    Thanks Tom for yet another informative video on something I didn't know existed.

  • Hallam Crafer
    Hallam Crafer 4 meses atrás +576

    I got three on my Tom Scott bingo today:
    "It's unnerving to be standing this close"
    "X doesn't just mean X, it can take months..."
    "I hope the size and scale is coming across on camera"

    • Synthetic_Future
      Synthetic_Future 4 meses atrás +5

      You also got the free center square "Tom wears a red shirt and jeans"

    • Barry Munro
      Barry Munro 4 meses atrás +1

      Technical commentary on a porn video???!

    • RisingStar
      RisingStar 4 meses atrás +12

      Don’t forget the “ah! I got x’d, ow”

    • kelaarin
      kelaarin 4 meses atrás +10

      Now make it a drinking game.

    • SCP-049
      SCP-049 4 meses atrás +23

      Where do I get a copy of the bingo card?

  • kwisin1337
    kwisin1337 4 meses atrás +1

    As always Tom, 10 out of 10. Please keep this up. More of youtube needs to mimic your skills.. love the work. Be safe.

  • daniel 39
    daniel 39 4 meses atrás

    would be interesting to see how long the solar powered road ways lasts with this.

  • Jeff NME
    Jeff NME 4 meses atrás +2

    Massive and fast spinning machine in the background, I bet Tom is wondering "What's the worst that could go wrong?"
    I wonder if they've considered adding UV spotlights, to simulate a longer exposure of the surface to sunlight?

  • SentinalSlice
    SentinalSlice Mês atrás +1

    From the thumbnail, I though that it spun really fast on the side of the road to make cars weary of driving to fast or risk losing control and crashing into the spinning death wheel.

  • Brooks Moses
    Brooks Moses 4 meses atrás +1322

    For those wondering about tire life: At the typical speed of 70km/h, that's about 1700km in a day, or 50,000km in a month. Commercial truck tires are apparently expected to last somewhere between that long and twice that long, spending on which hastily-found online source one reads.

    • Bryant Easton
      Bryant Easton 2 meses atrás

      Last time I replaced rear dual tires on my semi-truck here in the US they had gone 378,000 miles.

    • johno
      johno 3 meses atrás

      @FurnitureFan keep they stray elephants out?

    • FurnitureFan
      FurnitureFan 3 meses atrás +1

      @johno I assumed the strong fence was to protect wildlife from wandering in overnight.

    • AnElbow
      AnElbow 4 meses atrás

      @EhCanadianKid1 the curve produces wear too

    • Famed
      Famed 4 meses atrás

      Who asked?

  • EspenX
    EspenX 4 meses atrás +2

    I want to ask a question about the inner support wheels on the really narrow path, but I feel like it is like the "why don't you build the whole plane of what the flight recorder was built of" kind of question. So I guess the rubber and pavement is really, really heavy duty and long lasting.

    • zach moyer
      zach moyer 3 meses atrás

      they most likely only support the full weight of the arms while the outside wheels are being changed and have very little load on them during operation so they last longer

  • MaNNeRz Laguna
    MaNNeRz Laguna 3 meses atrás

    In my area there's still a test patch in one of the industrial estates using different types of brick surface and they're still holding up today. Older than me.

  • MultiEmoto
    MultiEmoto 4 meses atrás

    I wonder if the machine results have ever been compared to how the tested products fare out in actual use.

  • Lorenzo Garcia
    Lorenzo Garcia 26 dias atrás

    i wonder how soon after laying a new road do they actually start testing, as here in the US a newly paved road will start getting traffic as soon as the next day. and i wonder if they include any road grime like oil/fuel leaks from vehicles overtime..

  • Restore It
    Restore It 4 meses atrás +2410

    How do you find these places, Tom? Great video, cheers!

    • Mike Ernst
      Mike Ernst 4 meses atrás +1

      @Steve It's in the video description ;)

    • Steve
      Steve 4 meses atrás +1

      Not sure he’d want to give that information away

    • Dom Jones 🇬🇧
      Dom Jones 🇬🇧 4 meses atrás +1

      @rafaelskt4ever yep

    • ayisdec
      ayisdec 4 meses atrás +3


    • Ilya Popov
      Ilya Popov 4 meses atrás +73

      "I've got an email..."

  • Private Public
    Private Public 4 meses atrás

    I thought it's the seasonal change such as heat, rain, frost (and road salt) that deteriorate roads the most.

  • Chakat Nightsparkle
    Chakat Nightsparkle 4 meses atrás +3

    There is actually 1 of these Accelerated Pavement Testing Facility's in New York and 1 in Virginia in USA. I Remember a News Segment couple years ago that showed these in action.

  • Jake Outdoors
    Jake Outdoors 3 meses atrás

    This is very interesting. I have never heard of a Fatigue Carousel before. Its amazing how the Romans built rods that could handle the technology they were driving at the time. Some of those roads survive today. While today our roads need repaired constantly.

  • Greg
    Greg Mês atrás

    It looks extremely intimidating but I do think a lot is lost in the video in regards to the scale of that machine.

  • Timothy Swag
    Timothy Swag 4 meses atrás

    Imagine being out on that when the machine starts up. Then you get to test 20-30 years of hit-and-run accidents.

  • Bob Hilbig
    Bob Hilbig 3 meses atrás

    Makes me so happy to see tom travelling the world again. Means the world is getting slowly back to normal.

  • lozinja
    lozinja 4 meses atrás

    I watched this video and had an uncomfortable thought of what would it feel like to be in an unsteerable parachute drifting down and towards that thing going at full tilt in the dark.

  • boltonky
    boltonky 3 meses atrás

    Amazing and that's a lot of mass moving, the problem is with all the computers and knowledge of engineering we still get basics wrong. KISS is harder than you think

  • Joshua Watson
    Joshua Watson 4 meses atrás +560

    This is what I would call a perfect Tom Scott video. A really unique thing that does one job, and does it very well, that I didn’t know I wanted to learn about. Thank you!

    • iabervon
      iabervon 4 meses atrás +3

      This is such a Tom Scott subject that I thought I'd already seen a Tom Scott video about it until I realized that wherever I'd seen it previously didn't have in-person video with the person explaining it.

    • Zyo117
      Zyo117 4 meses atrás +5

      Nah, that's Tom Scott Plus

    • clray123
      clray123 4 meses atrás +7

      It's not a perfect Tom Scott video without Tom Scott strapping himself to the carousel and passing out due to G forces.

  • HK Guitar
    HK Guitar 3 meses atrás

    Some drone video footage might have helped show the scale of this machine.
    Really interesting, thank you.

  • Lee Howarth
    Lee Howarth 3 meses atrás +1

    My takeaway is just how good the engineers English is, imagine being able to speak another language to such a high level.

  • Ariel Sorensen
    Ariel Sorensen 10 dias atrás

    Most road warps and potholes I know of are caused by braking. This machine simulates wear on a road with even speeds, but what about where stop signs are, or if a few big trucks stop in the same stretch of road? Is there any braking measurement?

  • Down Under
    Down Under 3 meses atrás

    The modules at the ends of the arms look similar to the cross section of an aircraft wing. Imagine changing the shape slightly and increasing the speed it might just take off!

  • MAC SandSquid
    MAC SandSquid 4 meses atrás +629

    Yet another job nobody told me about during the high school job fair, along with flinging chickens at airplanes. Thanks Tom.

    • lunavixen015
      lunavixen015 4 meses atrás +1

      @Robert Pruitt Chickens aren't the risk to planes, but they are the best analogue for the average bird and most easily available.
      Bird strike can absolutely down a plane

    • Pyroteq
      Pyroteq 4 meses atrás +1

      @kat The alternative is 300 dead passengers on a commercial aircraft including children whose finally moments would be sheer terror as they plunge into the ground close to the speed of sound...
      The real tragedy is that after going through the engine there won't be anything left to BBQ.

    • Robert Pruitt
      Robert Pruitt 4 meses atrás +4

      Well TBH, if you're flying into chickens, you've probably got other problems to worry about.😄

    • lunavixen015
      lunavixen015 4 meses atrás +7

      @kat It’s used for testing for bird strike, a real phenomena when flying and using other objects would add variables that can’t be controlled or wouldn’t match what happens with a real bird

    • The Bird
      The Bird 4 meses atrás +8

      @kat Well simply put, nothing can more accurately tell you the effects a duck would have when hitting something, than a duck.

  • soapybeepy
    soapybeepy Mês atrás

    How often is this in use? How often does a new road building method or material come about?
    This was great btw

  • sToneForesT
    sToneForesT 13 dias atrás

    This is the kind of niche job I want. So random and specific, no one knows how you’re getting paid for it, or that you could get paid for something like that.

  • Killer Mudkip
    Killer Mudkip 3 meses atrás

    My lack of self preservation instincts became really apparent when Tom said its unnerving to be in front of 4 ton arms going at 70 km/h and I could only think "but why, you'll just die if they hit you". I think I'm gonna talk to my therapist tomorrow thanks Tom you've given me the knowledge that I'm an idiot

  • Neil Barnett
    Neil Barnett 3 meses atrás

    Do they ever twist the wheels to check the behaviour of road surfaces where vehicles turn? (lateral and torsional forces)
    It would be scurrilous of me to suggest that Amey, who have the contract to rebuild the roads of Sheffield, have never looked into any of this.
    To be fair to Amey, this carousel tests level roads with minimal lateral forces, but real roads have slopes, other lateral forces from braking vehicles and twisting forces from turning vehicles. Sheffield roads have all three, as you can see at corners on hills and at bus stops and traffic lights.

  • Cynnicysm
    Cynnicysm 4 meses atrás +479

    Much respect to the small inner ring of apparently indestructible material, quietly holding up without being part of the test.

    • Ned Kelly
      Ned Kelly 4 meses atrás

      @Derrick Foster I now understand hydroelectricity!

    • MrNukealizer
      MrNukealizer 4 meses atrás +4

      @Boo Bah You need something to generate electricity for an electric motor too.

    • Vigilant Cosmic Penguin
      Vigilant Cosmic Penguin 4 meses atrás

      It's really the backbone of the whole operation.

    • Ryan Mitcham
      Ryan Mitcham 4 meses atrás +1

      @Boo Bah Of course, but that doesn't make it stop being a hydraulic motor, or it correct to call it an electric motor.

    • Boo Bah
      Boo Bah 4 meses atrás +4

      ​@Ben Hobby Hydraulics aren't a power source; you need _something_ to crank the pump.

  • Lee The Flea
    Lee The Flea 2 meses atrás

    Way cool Tom! However, doesn't the fact that the wheels are traveling in a constant circular motion add an additional lateral (g?) force that wouldn't normally be present in a vehicle that's traveling down a mostly straight highway? I realize vehicles make turns as part of their normal use on the road, but making turns is probably a less frequent occurrence.

  • Lasivian Leandros
    Lasivian Leandros 26 dias atrás

    Always so damned interesting Tom. Love it. :)

  • John Pitt
    John Pitt 2 meses atrás

    These are the type of machines I be expecting on game shows..I'd watch endlessly 😅

  • Pat Drake
    Pat Drake 29 dias atrás

    It would be interesting to recreate a Roman Era road for one of the tests! You would probably see hardly any difference considering we still have roads from the Roman empire!

  • ToyKeeper
    ToyKeeper 4 meses atrás +680

    That is seriously unnerving. I've had nightmares about being stuck to the outer wall of a machine like this, with incomprehensibly massive arms passing at astronomical speeds just inches from my face. I didn't know such a thing actually existed!

    • MixnMatch Flavour Bleach
      MixnMatch Flavour Bleach 4 meses atrás +1

      If you think oversized objects moving quickly is freaky,
      I'm not gunna tell you to look up what a ships propeller looks like in motion underwater

    • Dillinger
      Dillinger 4 meses atrás

      Could these hallucinations be from the body overproducing DMT?

    • k
      k 4 meses atrás +2

      Hey big fan of your flashlight UI software :) imo you changed the scene forever

    • Old man
      Old man 4 meses atrás

      If you were actually in that situation, that would be a great opportunity to practice controlling your mind/fear. Making your amygdala stand down can save your life!

    • Ostensibly Average
      Ostensibly Average 4 meses atrás +3

      ToyKeeper' Therepist: The giant machine which spins massive metallic arms at high speeds isn't real, the giant machine which spins massive metallic arms at high speeds can't hurt you. I mean, why would someone even invent the giant machine which spins massive metallic arms at high speeds?
      Tom Scott: Explaining exactly why the giant machine which spins massive metallic arms at high speeds was invented.

  • Charles Smith
    Charles Smith 3 meses atrás

    I had one of those in my back yard. I never knew what it was for so we just cut it up for scrap. Oh, well. I could have used it to test my driveway.

  • Martin Kirik
    Martin Kirik 4 meses atrás

    2:10 You can stand by a busy road and not feel a thing, but when it's an unusual situation, it's unsettling.

  • Kevin
    Kevin 4 meses atrás +1

    This reminds me of the ceiling fans we have at work. They're "big-ass fan" brand fans, and they're appropriately huge and I am constantly turning the one near us down because it make me really, really nervous.

  • Aidan Šeštokas
    Aidan Šeštokas 3 meses atrás

    Australia could do with one although I think we'd just ignore it's existence and continue to turn our roads into more of a patchwork than a surface worthy of traffic

  • marcianoacuerda
    marcianoacuerda 4 meses atrás +374

    The limitations Mr Hornych talks at the end are just as important as the benefits. I really enjoy listening to researchers because they try to look at every angle possible.

    • Callum Beatson
      Callum Beatson 4 meses atrás +2

      @Pat The Plant In this case I don't think it matters. The road surface should not experience any transverse force from the wheels because the centripetal force is on the rotor.

    • MonkeyJedi99
      MonkeyJedi99 4 meses atrás +3

      @Pat The Plant Hmm... Something with good shear profile, but bad compression response?

    • Augmented Smurf
      Augmented Smurf 4 meses atrás +10

      @Pat The Plant I imagine that ruts and grooves appear more in straights than on curves. I can't imagine that a lot of people will take the same exact route through a curve, but when it comes to straights, people will generally just follow the middle of the lane.

    • Pat The Plant
      Pat The Plant 4 meses atrás +5

      I wonder if there are materials that are fine on curves but fail rapidly on the straight.

  • Zipp4Everyone
    Zipp4Everyone 4 meses atrás +3

    That is quite interesting. Would be lovely to discuss the effect of the lateral force being applied to the wheels while spinning like this and how that affects the end result.

  • Dusty Boot
    Dusty Boot Mês atrás +1

    Now how exactly does this machine test for snow, ice, rain, exhaust, various other types of chemicals?

  • sageinit
    sageinit 2 meses atrás

    Sad that it can't run at the max speed limit of 130 km/h, seems like that might make it not perform a full simulation, but I imagine that'd make the machine too unstable?

  • KingRCT3
    KingRCT3 4 meses atrás +4

    The only remaining unanswered question: has anyone ever rode this thing?
    Speaking of amusement rides, French manufacturer Reverchon had to make a fatigue test machine that simulated jeans (> butts) rubbing on a coaster seat. Same idea, testing in months what several years of operation would do to the padding.

    • eDoc2020
      eDoc2020 3 meses atrás +1

      I'm glad I wasn't the only one to think of that.

    • FurnitureFan
      FurnitureFan 3 meses atrás +1

      My local IKEA has a machine running to show how they test out chairs to last. It's good to see.

    • Loturzel Restaurant
      Loturzel Restaurant 4 meses atrás

      Know Joe Scott though?