A family member in the DOT told me this as but one of many tales of woe. Several hundred miles of an interstate were going to be rehabbed. There was a proven technique to redo the joints between the concrete slabs, which were in good shape. A contractor was hired to do a small number of miles as a test, but they had a learning curve. The first few joints that they redid were not done well, but they rapidly improved a…
Almost certainly they switched contractors because of corruption. Here in Montreal, it's well known that the mob runs the construction industry and quite frankly you're not allowed to even bid on contracts without their say so, otherwise you'll get visited for a very frank chat. So I can't speak for why infrastructure is expensive elsewhere, but atleast here in Quebec (& likely RoC) it's simply because of corruption.…
And this has been studied. The reason is simple. The pave mix uses used car engine oil instead of new bitum/oil. This leads to surface crumbling at much higher rate.
Yet everything is blamed on the winter and salt.