Effects of a Feedback/Reward System on Speed Compliance Rates and the

Speeding is known to contribute to crash risks and severities. One approach to inhibit speeding is to use technology to monitor driver speed and provide drivers with feedback. This paper investigates the effects of a feedback/reward system on speed limit compliance rates as well as the degree of speeding during noncompliance. Data utilized in this research were collected from 37 participants (20 to 70 years old) through a field trial commissioned by Transport Canada. In this field trial, a feedback/reward system was investigated, which provided feedback and rewards to the drivers based on speed limit compliance and safe headway maintenance. The trial consisted of three phases: baseline (two weeks), feedback (twelve weeks), and post feedback (two weeks). Real-time feedback was provided on an in-vehicle display. During the feedback phase, participants also accumulated reward points and could view related information on a special website. Results suggest that feedback increased speed limit compliance, and this positive effect, although dampened, was still apparent even after feedback removal. Moreover, when considering cases with no lead vehicle ahead, the positive effects persisted for high speed limit zones (70, 80, 90 and 100 km/h). In general, when the drivers were noncompliant, the degree o