Merge Midwest was part of the HDR team that completed traffic signal optimizations for multiple interchanges along Route 364, Route 64, and I-70 in the Saint Louis, Missouri area. These corridors are shorter than a typical corridor with approximately two-to-three signals interconnected through each interchange. Merge Midwest’s responsibilities included the development and calibration of the Synchro® signal timing models; calculation of the pedestrian and vehicle clearance times; signal optimizations; plan and schedule development; and assisting with the technical report.