Comments by "Science in Engineering" (@matsv201) on "American Amazed By Efficient Road Construction in Germany" video.

  1. Typically asfalt is swiched out every 20 years and the road bed every 40. But sometimes if the bed is decent they can just cut deaper and do a 3rd 20 year period with now asfalt. Of cause redoing the road bed is not that hard if its a gravel bed. There is specialy machines that doe it in one pass. That is when there is a concrete bed that is a problem and they do have a lot of those in germany. They supose to last longer but really dont.
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  2. ​ @automation7295 yes. But 6 weeks for 4 km is really not good, it should take like 1.5 weeks maximum. Germany is the laughtingstock of road construction in europe
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  3. Typically road works run on a 20/40 year shedual. That is replace the surface layer every 20 years and the bed every 40 years. The machine that removes the asfalt is just as fast as the one laying it. In some large prject they can even use the return trucks to truck the old asfalt away. We even got mobile plants thst reprocess the assfalt localy so the truxmcks just need tl drive a few km For the bed they need to reprocess thst to. But there is.a machine to reprocress the beed in only one go. A highwsy bed is only 1 meter thick, compare to a railwsy bed that is typically 2.5 meter deep. So thst reprocessing is pretty simple. Anything below 1 meter is sub surface and that is never reprocessed.
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  4. I dont know how common this is around europe. But where i live we have "flying" road construction. That is there is one truck that sets up the construction (sometimes 2) one (or two( that pull it down then the construction crew is between. This way they can start up construction around 9:30. Run it untill about 2:30 pm pull it down, then set it up and run it a few more hours in the evavning. When its rush hour the constructiion is totaly removed. They typically just do one lane (and curb) but the construction moves forward at pace.
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