SRF was selected by the City of Dayton to design a new access interchange on I-94. We started the project by evaluating several interchange concepts. SRF prepared concept design plans for top contenders and worked with project stakeholders (Cities of Dayton and Rogers, Hennepin County, MnDOT, BNSF Railway, MPCA, MnDNR, and USACE) to select a final configuration. A diverging diamond interchange (DDI) configuration that will serve the traffic patterns of the area while minimizing impacts to adjacent property owners was selected.
As part of preliminary design, SRF completed the necessary environmental documentation and helped to procure federal and Local Road Improvement Program funding.
SRF prepared corridor modeling using Geopak to analyze construction limits and compute earthwork quantities. Design plans were prepared using MicroStation SS-4.
In addition to roadway design, SRF prepared traffic signal and ITS design plans. The signal design was unique as MnDOT chose to use one controller for the two DDI crossover intersection traffic signals, necessitating the use of an ATC signal cabinet to handle all necessary detection inputs and phase and overlap outputs.
Other aspects of the project included bridge surcharging with wick drains, floodplain mitigation, billboard relocation, and the use of combined jurisdiction water resource Best Management Practices (BMPs).