Bowman is providing Phase I Engineering Services that include Intersection Design Studies, a Drainage Technical Memo and preparation of a Project Development Report for 75th Street. As a safety improvement project, Bowman is evaluating four intersections to identify improvements that will address the accident history, increase the safety of the intersections, and create continuity throughout the corridor while minimizing impacts to the operational characteristics of the intersections. Bowman staff utilized Highway Capacity Software (HCS7) to analyze the signalized traffic capacity at each intersection. Improvements include traffic signal modernization, incorporation of high visibility backplates, conversion of the left turn 75th Street approaches to protected only phasing and adding a dedicated right turn lane on each 75th Street approach to remove turning vehicles from the thru lane movement.
Work includes:
- 75th & Millbrook Drive – Add westbound right-turn lane, extend westbound left-turn lane.
- 75th & Modaff Road – Add westbound and eastbound right-turn lanes, extend left-turn lanes.
- 75th & Olympus Drive – Add westbound and eastbound right-turn lanes, extend left-turn lanes. Address pedestrian accident history.
- 75th & Greene Road – Add westbound and eastbound right-turn lanes, extend left-turn lanes
Bowman also prepared Environmental Survey Requests (ESR) for the four intersections.