I-94 Interchange (Exit 161) Reconstruction

NDDOT broke ground on the I-94 Interchange (Exit 161) Reconstruction project in spring of 2024, with construction expected to run through the summer of 2026. The interchange reconstruction project is designed to support growth in this area of Bismarck and relieve what has become an increasingly congested corridor along Centennial Road/Bismarck Expressway and I-94. NDDOT has worked closely with the City of Bismarck, local business owners, and the general public to find a traffic solution that would benefit the entire community. The modified single-point urban interchange (SPUI) selected for this project will efficiently move large volumes of traffic by converging traffic under one set of traffic signals. Use this page to stay updated on project developments, traffic impacts, and important safety information related to this project.

Project Updates

Construction Progress

• Temporary median removal and asphalt work at Centennial Road/Bismarck Expressway to support traffic flow during construction.  
• Temporary traffic signal installation at Miriam Avenue and Trenton Drive.  
• Construction work on the new bridge continues. 

Traffic Impacts

• Centennial Road/Bismarck Expressway reduced to one lane in both directions. Expect varied lane closures as construction progresses.
• I-94 reduced to one lane in both directions. From 10 p.m. to 6 a.m. nightly, all lanes close and traffic is rerouted across Centennial Rd/Bismarck Expressway, re-entering I-94 via off- and on-ramps.
• Temporary loop ramps will be in use at the interchange beginning the week of May 5. Learn the traffic pattern changes below:
  • Enter I-94 West via the temporary loop ramp – existing on-ramp closed.
  • Exit I-94 East via the temporary loop ramp – existing off-ramp closed
  • Use existing ramps to enter I-94 East or exit from I-94 West.