Photo Radar Speed Enforcement in a State Highway Work Zone: Demonstration Project Yeon Avenue – Final report
Key data collection periods:
- Prior to work zone and photo-radar enforcement (November 2008 to March 2009)
- After the work zone was established, but before photo-radar enforcement was implemented (March 2009 to September 2009)
- After the work zone was established and during periods with photo-radar enforcement (March 2009 to mid-September 2009)
- After photo-radar enforcement equipment and signs were removed (late-September 2009).
During photo-radar speed enforcement speeding was reduced by an average 23.7 percent at the detection site within the work zone. The observed speeding reduction, however, was temporary and did not persist beyond the departure of the photo radar enforcement van.