How Effective Are Radar Speed Signs?
Radar speed signs have been proven to be highly effective in calming traffic and reducing the likelihood of fatal accidents involving pedestrians and automobiles. Studies consistently show that slowing down traffic significantly decreases the chances of severe outcomes. For instance, a pedestrian struck by a car at 40 mph faces a staggering 90% fatality rate, whereas at 20 mph, the fatality rate drops drastically to just 10%. The accompanying graph underscores the profound impact that even a minor reduction in speed can have on the survival outcomes for those involved in such incidents.
Radar speed signs stand as a tried-and-true solution for promoting speed awareness among drivers. Studies consistently highlight their efficacy, revealing that drivers, when alerted by a radar sign, exhibit a substantial reduction in speed up to 80% of the time. On average, radar signs contribute to typical speed reductions ranging from 10% to 20%, leading to an impressive overall compliance increase of 30-60% with posted speed limits. Radar signs are particularly effective at getting “super speeders”—speeders driving 20 mph or more over the posted speed limit—to slow down..
- Radar Signs Show Decline in Average Speeds
- Radar Signs Show Shift of Peak Speeds to Lower Speeds
- Radar Signs Show Speed Limit Compliance At Plant Entrance
- Radar Signs Show Long Term Reduction In Speeding Drivers
- Radar Signs Show Long Term Reduction In Average Speeds
All data collected with StreetSmart Traffic Data Collection and Reporting software.
Decline in Average Speeds
After 21 months of operation, the radar speed sign continues to be effective in reducing the average speeds in a 25 MPH neighborhood cut-through street.
Shift of Peak Speeds to Lower Speeds
Six months of operation of a radar speed sign on a neighborhood cut through street demonstrates the effectiveness of the sign in lowering peak speeds to lower speeds.
Speed Limit Compliance At Plant Entrance
1.5 years of radar speed sign operation at a plant entrance shows 55% more vehicles obeying the posted speed limit (PSL).
Long Term Reduction In Speeding Drivers
2 years of radar speed sign operation on a 40 MPH arterial street shows consistent, long-term reduction of speed.
Long Term Reduction In Average Speeds
2 years of radar sign operation on a 40 MPH arterial street shows average speeds maintain drop of 3.5 MPH.