Yeah ran out of time to balance the difficulty. On hard mode stuff barricading the roads should get destroyed after one hit from the delivery driver after he turns but wasn't sure if that was working properly. Will probably play around with adding damage to the barricades on other modes and tweaking stuff to increase the difficulty on normal and hard mode.
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I think the barricade breakage didn't occur since I saw the driver pass by them multiple times and I never had to replace them. It might have been because the rerouting AI didn't think it needed to try to break through the barricade because it had other options but since it was a loop I created it didn't know how to break out of it.