It is a common myth that posting a lower speed limit sign will force drivers to slow down. Unfortunately, these speeding drivers are already ignoring the posted speed limit. To reduce the speed will only create conflict with a variety of speeds being traveled at the same time.
Traffic Engineering studies help to determine the prevailing speed of the majority of drivers using a certain street. Studies take into account crash data, traffic volumes, speeds traveled and road conditions to determine the appropriate speed limit.
Click here to visit the Traffic Engineering web page.