The tradeoff with that is that you end up with more than one lane per direction, which works fine with signalized intersections, but is unsafe at non-signal-con

The tradeoff with that is that you end up with more than one lane per direction, which works fine with signalized intersections, but is unsafe at non-signal-controlled crosswalks. Without a traffic light, a car in one lane will stop for a someone waiting to cross, and a driver in the other lane (or who pulls around to pass the first car) might not realize that there is a reason for the car stopping, and hit the person crossing as they enter the other lane.