In Indiana, distracted driving and unexpected queues have led to an increase in the amount of back-of-queue crashes, particularly on approach to work zones. This report presents new strategies for the assessment of both transportation safety and traffic operations using crowd-sourced probe vehicle data and a speed laser vehicle re-identification scheme. This report concludes by recommending strategies for the placement of variable speed limits (VSL) adjacent to work zones and suggestions for future research.

The 2013-2014 Indiana Mobility Report: Full Version examines the mobility performance of Indiana's state highway system. Minute-by-minute crowdsourced probe vehicle speed data and vehicle volume data were used to develop performance measures that identify, quantify, and visualize the location and duration of congestion on Indiana Interstates. The report presents overall system performance, including a monthly overview covering January 2011 through June 2014 as well as selected highlights of significant projects. In addition to the Interstate system, the report characterizes selected high-priority arterial corridors to rank their mobility performance in terms of travel time and travel time reliability.