Introduces the use of crowd sourced probe data collected from vehicles and mobile devices to quantify the location and duration of congestion on Indiana interstates. The report presents a detailed case study of the I-65 corridor, as well as examples of travel time reliability information for sections of Interstates 65, 70, and 94. Summary monthly mobility statistics for all 943 centerline miles of Indiana Interstates 64, 65, 69, 70, 74, 94, and 465 are tabulated in a graphical format to facilitate comparison of mobility along those corridors.