Knowledge Resources

The Korean National Police Agency (NPA) Automated Speed Enforcement (ASE) system performed speed measurement and vehicle license plate identification using inductive loop detectors, digital cameras (1024 by 1024 resolution), and neural network imaging identification software at 32 field stations. The local imaging information was transmitted to a number of central locations where the data was recorded and processed by automatic written notice senders.

The effectiveness of the ASE system was studied using crash data collected before and after system deployment. The "before data" was collected from April 1996 to July 1997, and the "after data" was collected from April 1997 to March 1998.

RESULTS

During the first year of operations in the study area annual fatalities decreased 60 percent (107 to 43) and the total number of accidents decreased 28 percent (801 to 576). Vehicle speed data collected after ASE deployment showed average vehicle speeds were reduced, and speed distributions were more uniform. Short headway times of 1 second were most common on road sections 500 meters upstream and 500 meters downstream of enforcement points. Longer headways times of 1.5 seconds were most common adjacent to enforcement points.

Notes:
The "after data" was limited and represented only one year of operations. It was unknown if reductions in accidents and fatalities could be sustained.