Variable message signs: are they effective TDM measures?
Saleh, W., Walker, C., & Pai, C. W. (2009). Variable message signs: are they effective TDM measures?. In Travel Demand Management and Road User Pricing: Success, Failure and Feasibility (135-150). Ashgate Publishing
This chapter investigates impacts of Variable Message Signs (VMS) on accidents rates and severities on Scottish trunk roads. A before and after analysis of accidents at 14 selected VMS sites in central and north-east Scotland is presented.