Tell that to the civil engineers who designed spaghetti bowls full of splits and left-exits and ignored surface street routes and mass transit so even when the freeways are moving at the speed limit there is enough traffic that there is no guarantee there will be enough space to move over at the perfect time.

This is a lovely enough idea for actual intercity travel, and it only takes a couple of clueless asses to make that frustrating, but I see people who think it’s actually realistic in populated areas and I shake my head.