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Abstract:Increasing traffic volumes on Arizona's State Highway System are contributing to the increased frequency and duration of incident-caused rural highway closures, amplifying the need to effectively divert traffic around these situations. Through this research project, the Arizona Department of Transportation (ADOT), in collaboration with other state agencies, is addressing the need for a statewide, seamless and homogenous set of current alternate routes to supplement the existing detours developed by ADOT District offices. To accomplish this goal, this project developed an alternate route database in close cooperation with the ADOT Districts and Arizona Department of Public Safety (AZ DPS). The alternate route electronic database and workbook will be distributed both internally within ADOT and to DPS as a controlled document. Both agencies will use the detour workbook for incident management, with designated ADOT staff continuing to update the workbook as needed. In the future, ADOT can use rural Variable Message Signs (VMS) and other systems to implement detours from the workbook and include detour information in Highway Closure and Restriction System (HCRS) bulletins.
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