Why Railroads Don't Need Expansion Joints

Practical Engineering already explained the correct solution to this problem: ▶ this video But of course, American infrastructure was built on the cheap, and is not maintained correctly. This is why we can't have nice things.

Not going to be claiming to be an expert, but buckling is a well documented phenomenon and I'd be surprised if there wasn't possible issues due to contraction on the other end of the spectrum when it gets colder, the track was laid this last spring/summer so it's probably not been as cold for long before on the tracks. Also modern high speed rails are built with continious welding without thermal expansion joints. ▶ this video goes through track building and the effects and literally mentions at about 12:30 that they do need to do inspections when it gets cold if the track cracks (there was a photo linked in another post about a cracked track). Is it the cause? No idea but doesn't feel far fetched. Edit: Seems official investigators are now even pointing to that as an initial theory, link

admittedly, it does fall far short of being practical; if your preparation for building a railroad is watching ▶ this video and your preparation for building a landfill is watching link , your trains will derail and your garbage will leach into your groundwater but that's not really a difference between the two channels; real engineering manages to pack plenty of misstatements into videos that are equally superficial

They also expand the rail with thermite which is probably hotter than the sun is going to make the earth. ▶ this video