Implementing Graphic Route Information Panels (GRIPs) in the United States

Abstract

Graphic route information panels (GRIPs) represent the latest innovation in dynamic traveler information systems. GRIPs provide real-time color-coded information on congestion in a graphical format for specific segments of the local transportation network. Although several countries are experimenting with GRIPs, to date there have been no U.S. trials or investigations. This paper investigates the potential for implementation of GRIPs in the United States. A literature review of GRIP studies and pilot projects around the world was conducted in order to guide the design of GRIP prototypes for U.S. application. The prototype incorporated lessons learned from previous GRIP projects as well as Texas Manual on Uniform Traffic Control Devices standards. An Internet-based survey was then conducted to evaluate the potential utility and comprehension of GRIP prototypes among drivers in Austin, Texas. The survey results suggest that GRIPs could have a positive impact on congestion. Most drivers understood the message portrayed by the GRIP and indicated that they would use the GRIP information to modify their travel patterns.

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