Improving Safety through Missouri's Intersection Safety Implementation Plan (ISIP)

2016PDFBriefFHWA-SA-16-080Traffic safetyIntersectionsImplementationUnited StatesUnited States. Federal Highway Administration. Office of SafetyUnited States. Federal Highway Administration. Office of SafetyMissouri. Department of TransportationNelson, JonMiller, John S.Federal Highway AdministrationThe Federal Highway Administration (FHWA) provided technical assistance to Missouri in the winter of 2008 to develop an Intersection Safety Implementation Plan (ISIP). FHWA held a workshop, provided a data package, and identified a list of candidate intersections by countermeasure type. Lastly, they provided the completed ISIP to the State in May 2009. Prior to the ISIP, the Missouri Department of Transportation (MoDOT) focused on improving intersections with high volumes, but the ISIP introduced MoDOT to applying a systemic approach. With this approach, MoDOT can install low-cost, effective countermeasures at a large number of locations with moderate to high crash frequencies. Missouri has also identified improving intersection safety as one of the top nine strategies in its latest Strategic Highway Safety Plan.93