>That might work, though few drivers in the U.S. heed speed limits even in construction and school zones, Because there's nothing in it for them. Most school

>That might work, though few drivers in the U.S. heed speed limits even in construction and school zones, Because there's nothing in it for them. Most school zones don't have kids anywhere nearby outside two specific times of day. Most construction zones don't actually have construction happen. Many posted speed limits are either artificially low by statute (state laws to the tune of "if road has X then max speed limit = Y" are common), for revenue purposes or to account for a temporary condition that does not affect the entire area where the speed limit applies (e.g. a single tight curve or trucks enter/exiting during business hours). In light of these it's no wonder so many drivers disregard posted limits since it allows them to get to their destination faster. If drivers knew that a particular travel speed would result in hitting all greens then you can bet your ass the majority of them would drive that speed. There's a ton in it for them.