An empty pickup truck just sits on a highway — until a semi comes along and obliterates it (video)

Yah, they do have a lot more inertia and tendency to track straight as a result. Cars do too, though. Car suspensions have a few degrees of “caster” designed into them. This is what makes the steering straighten itself out when you let go of the wheel after a corner, and it makes cars tend to track straight. It’s also down to the road quality. In my misspent youth (and I am not proud of this) I have fallen asleep at the wheel of my car and woken up a couple of miles later. It was a deserted highway and the road was good, so the car tracked fine. On some beat up freeways, the car wouldn’t track itself for more than a few yards. It depends.

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