What is the purpose of automated lighted signs set up by some police departments?

Automated lighted signs set up by police departments primarily serve the purpose of displaying a driver's speed to enhance awareness. These signs actively communicate the speed at which a vehicle is traveling, allowing drivers to adjust their speed accordingly. The visibility of the speed display can prompt immediate behavioral change, encouraging safer driving habits on the road.

By providing real-time feedback on speed, these signs help to promote awareness of speed limits and can act as a deterrent to speeding. They are educational tools, aiming to create a more cautious driving environment, especially in areas where speeding may pose significant risks.