Does Lowering the Speed Limit Solve a Speeding Problem?
Municipalities and other agencies, which are responsible for traffic control, are occasionally asked by citizens to reduce the posted speed limit after a traffic problem has been identified. Citizens hope that the lower speed limit will reduce operating speeds and accident potential. Although public agencies share the desire for lower speeds and improved safety, studies have shown that arbitrarily reducing the speed limit does not accomplish the desired result. It has been the City of San Antonio’s experience and many years of research have shown that lowering regulatory speed limits does not result in lower operating speeds nor in reduced accident potential. By and large, drivers chose their speed independent of the posted speed limit. Drivers select their speed intuitively based on the environment around them and the speed that feels comfortable and safe. “Before and After” studies have shown that there are no significant changes in average vehicle speeds following the posting of rev
