Assessment of Long-Term Effectiveness of Speed Monitoring Displays on Speed Variation

어린이보호구역에 과속경보시스템 적용에 따른 장기적 속도변화 평가

  • Lee, Sang-Soo (Department of Environmental Urban Systems Engineering, Ajou University)
  • 이상수 (아주대학교 환경건설교통공학부)
  • Published : 2006.06.30

Abstract

Speeding is one of major causes of frequent and severe traffic accidents in school zones. In this paper, the long-term effectiveness of speed monitoring displays (SMD) on speed variability was investigated through a field study in a school zone environment. The performance difference was discussed with several dependent variables including average speed, 85th percentile speed, and distribution of speed. Study results showed that the speed of vehicles began to reduce where the driver recognized the presence of an SMD, and about 12.4 percent (5.8km/h) of average speed was reduced at the SMD location. This speed reduction was observed throughout the day regardless of time of day. Statistical tests showed that the speed difference was statistically significant. In addition, analysis results of speed distribution showed that the number of speeding vehicle was greatly reduced after the SMD was installed, and 85th percentile speed also decreased from 54.3km1h to 45.0km/h. Therefore, it was concluded that the application of SMD produced a positive impact on the driver's behavior for a long period of times.

Keywords

safety;school zone;speed monitoring displays;speeding

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