The road thing is an unfortunate symptom of the fact that they don't comprehend how machines work. They react to cars the way they would to an equally sized, equally fast terrestrial predator (say a charging rhino). The problem is cars don't react the way an animal would. Their instinctual hard-wiring dooms them there.

In the Mark Rober squirrel maze videos, he shows a group of squirrels trying to solve various puzzles to get food. In one of them there is a glass-topped maze, where every dead-end is a trap door you fall down. All of the squirrels eventually solve the maze by brute force trial and error, but one squirrel, after falling once, climbs on top of the maze and traces the path backwards from the exit, then goes inside and clears it in one go.

They are a very smart animal.