> If you were to raise the speed limit to 75mph, people would just use the same logic to drive 90mph instead. Luckily there are plenty of places that have done

> If you were to raise the speed limit to 75mph, people would just use the same logic to drive 90mph instead. Luckily there are plenty of places that have done just that that we can learn from. WI just raised a lot of its highway speed limits to 70mph for example. Anecdotally, people used to drive in the 75mph range before the speed limit was raised and would deal with the occasional ticket for 10 over. In the general case, the average highway speed seems to have stayed at 75mph after the change. I've noticed something similar in South Dakota where the speed limit is 80. I rarely saw someone go more than 5 over, and would frequently encounter people driving at 75mph.