Effects of Intersection Collision Warning Systems and Traffic Calming Measures on Driver’s Behavior at Intersections

The objective of this study was to examine the effect of intersection collision warning systems (ICWSs) and traffic calming measure on drivers’ behavior, in response to a potential conflict event at the intersections, which constitute a crucial point with respect of the road safety. The drivers’ behavior was analyzed by means of a multivariate variance analysis (MANOVA) procedure. ICWSs were the auditory speech message and the visual warning. Both ICWSs provided to the driver the direction of the violator vehicle. The traffic calming measure was the dragon teeth. Results show that ICWSs help the drivers’ to detect earlier the violator vehicle and act a safer braking maneuver to avoid the conflict at the intersections. For the traffic calming measure no statistically significant effects were found. However, for this condition, a decrease of about 1.3 km/h of the minimum speed value reached by the driver to avoid the collision was recorded.