Stop signs, speed limits, and other traffic controls actually increase the likelihood of accidents on American roads.

That’s the theory of John Staddon, the Duke professor emeritus who delivered today’s address to the John Locke Foundation’s Shaftesbury Society.

4:15 p.m. update: Watch the entire speech here.

One item Staddon supports is traffic circles or roundabouts, though he supports low-tech options that involve a little bit of paint and minimal expense. Click here for the John Locke Foundation’s take on roundabouts