There is one of these in Cambridge MA (or was until recently when someone crashed their SUV through it): https://boston.cbslocal.com/2019/05/15/cambridge-mass-car-cr...
I mostly walk and bike in the city, but that whole neighborhood has wide, straight, clearly-marked roads. It's like you're out in the suburbs. If people have trouble there, how do they deal with some actually-confusing intersections, like Newton Corner, Inman square, or Columbia Road in Dorchester?