Broadway Avenue Reconstruction Traffic Engineering

Washington County, Minnesota

Washington County retained SRF to complete the preliminary design, final design, and construction of CSAH 2 (Broadway Avenue). SRF completed freeway and arterial analysis for various alternatives that included several interchange options and corridor configurations along CSAH 2. The recommendations from the preliminary design were carried forward into final design, which included the reconstruction of 11 intersections along the CSAH 2 corridor and the construction of five new and one revised fully activated coordinated traffic signal.

Along with the design of roadway improvements, two of the new signals were at I-35 ramp terminal intersections. The project included two types of vehicle detection (NMC loops and Sensys Networks wireless detectors) and fiber optic signal interconnect cable. The traffic signals were designed with accessible pedestrian signals (APS), emergency vehicle preemption (EVP) and flashing yellow arrow (FYA) displays for several of the left turn movements. CSAH 2 is being upgraded to meet MnDOT’s current ADA and PROWAG requirements. Eleven intersections were analyzed to ensure that adequate sightlines were provided, grades were within current standards, and push buttons and other signal equipment were properly located for accessibility to sidewalk and trail users. In preparation for detour traffic, SRF designed a temporary fully activated wood-pole span wire signal system on County Road 83.

CLIENT: Washington County