Speed limits in cities and towns where pedestrians are walking are already typically the highest safe speed limit, or even higher. The odds of a car-pedestrian

Speed limits in cities and towns where pedestrians are walking are already typically the highest safe speed limit, or even higher. The odds of a car-pedestrian collision resulting in a fatality increase dramatically in the gradient from 20 to 40 mph, and people love to speed in cities and towns where the limits are usually 25 or 30 mph. Limited-access highway speed limits are a different story of course and a lot of highways still have old 55 or 65 mph speed limits that are set for fuel efficiency due to the 1970s oil crisis, not necessarily the maximum safe speed.