Evaluation of Effectiveness of Automated Work Zone Information Systems

With the advancement of the Intelligent Transportation Systems (ITS) technologies, some Automated Work Zone Information Systems (AWIS) have been developed and deployed in the field with the purpose of providing useful real-time traffic information to motorists as they approach or pass through a work zone. Several evaluation studies have been conducted in order to answer the question if AWIS can provide the expected benefits. These evaluation studies paid more attention to the evaluation of system functionality and reliability. This paper focuses on the evaluation of the effectiveness of an AWIS system, called CHIPS, deployed in southern California. Studies were conducted on traffic diversion, safety effects, and driver survey in order to show its effectiveness. Evaluation results showed most driver survey respondents liked the system, which was found to be effective in diverting traffic and promoting smoother traffic flow during congested periods.