"Radar speed signs have shown a dramatic reduction in the speed of vehicles traveling in excess of the speed limit."
"They [radar speed signs] have proven to be consistently effective at getting drivers to slow down- reducing speeds by about 10%, an effect that lasts for several miles down the road."
"Streets where radar signs were installed continued to experience speed reductions months after the signs were installed."
"Speed display boards [Radar speed signs] effectively reduce vehicle speed, changing behaviors for the long term."
"In the vicinity of schools where radar speed signs were installed, drivers slowed an average of 14%."
"Reductions of at least 4% for angle crashes...can be expected with the installation of flashing beacons."
"In West Valley City, UT, the 85th percentile speed was reduced from 37 mph to 31-32 mph after the installation of a radar speed sign."
"Up to 70% of speeding drivers slow down at radar signs"