Analysis of Route Choice During Planned and Unplanned Road Closures

The Federal Highway Administration (FHWA) Alternate Route Handbook proposes guidance to identify alternate routes during planned and unplanned road closures. A challenge with this process is the lack of traffic data available decision-makers. High volume corridors experiencing closures can provide a rich case history by systematically collecting connected vehicle (CV) such incidents. CV ability directly measure actual diversion travel times an ongoing or historical incident. This paper presents methodologies analyze most common route choices impacted interstate exits, valuable information for public safety transportation agencies evaluate surrounding network’s resiliency in accommodating diverting traffic. Agencies use proactively deploy resources (officers, signs, barricades) at critical locations future scalability methodology demonstrated evaluating 12 additional cases assess rates found be range 58% 93% total exceeding five hours. concludes recommending apply these develop data-driven strategies on coupled real-time monitoring dispatch centers agile adjustment along routes.