1. Global Status Report on Road Safety 2018;WHO,2018
2. Analysis of Thailand Road Accident Situation;OTP,2019
3. Evaluation of Photo Radar Program in British Columbia;Chen,2000
4. Speed and safety effect of photo radar enforcement on a highway corridor in British Columbia;Chen;Accid. Anal. Prev.,2002
5. Van Schalkwyk, Evaluation of the Scottsdale Loop 101 Automated Speed Enforcement Demonstration Program;Shin,2009