EXECUTIVE SUMMARY

This paper presents what has been learned in four principal areas of arterial management: (1) adaptive control strategies (ACS), (2) advanced traveler information systems (ATIS), (3) automated enforcement, and (4) integration. The levels of deployment, benefits, deployment challenges, and future steps are presented for each category. ACS signifies traffic signal control systems that optimize timing plans in real time, based on current traffic conditions and demand. They have been shown to reduce delay and improve efficiency at intersections. Although the technology has been available for 20 years, ACS is not widely deployed in the United States. The sys-tems are considered expensive and complicated, and U.S. traffic engineers do not seem convinced of the associated benefits. ACS seems to have potential for wide-spread use in the United States, but deployment has not yet reached that point. ATIS for arterials provides information on arterial conditions (e.g., travel speeds, travel time, incidents) to motorists through such media as websites, radio, television, or personal devices. While surveys from the Metropolitan Model Deploymen