The role of wireless communications in transportation is becoming increasingly important. Wireless communications are critical for many applications of Intelligent Transportation Systems (ITS) such as Automatic Vehicle Location (AVL) and Automated Collision Notification (ACN), as well as being used to supplement dedicated radio systems. The exploding volume of cell phone users has even led to attempts to use them as probes for measuring traffic speeds and travel times. Simultaneously, the now verified increases in accident rates for cell phone users has become a high priority safety issue in the transportation community. Dialing a cell phone while driving causes frighteningly long lapses in drivers attention to the driving task (NHTSA, 1997). The use of commercial cellular service for communications among highway maintenance and emergency services fleets, interest in the private sector in bartering cellular service for use of KDOT right of way, and the ever increasing role of cellular communications in ITS applications bring issues to the fore that are integrally related to cellular coverage. Unfortunately, cellular coverage information is very tightly guarded by the cellular service providers, who often release only service area information, not actual coverage. In order to make good decisions about investing in these technologies, more detailed cellular coverage information is needed. Toward that end, The University of Kansas was asked by the Kansas Department of Transportation (KDOT) to collect data and develop analysis procedures to describe and assess the cellular coverage on the state highway system. This report details the methods used to collect and analyze the data, and makes recommendations related to the improvement of cellular coverage and the use of cellular technology in transportation applications.


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