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US-12/M-51 interchange rebuilding in Niles starts Monday

Fast facts:

  • Bridge removal and interchange rebuilding on US-12 and M-51 in Niles starts Monday with temporary paving and
  • The $27 million investment starts this October, with anticipated completion in October 2024.
  • This project will replace the existing US-12/M-51 interchange with a signalized, at-grade intersection with indirect left

COLOMA, Mich. ­- The Michigan Department of Transportation (MDOT) is starting work Monday, Oct. 2, to rebuild the US-12/M-51 interchange in Niles, Berrien County. The $27 million investment includes removing the US-12 bridges and ramps at M-51 and replacing the interchange with a signalized, at-grade intersection and indirect left turns, or “Michigan Lefts.”

The project includes repaving and rebuilding 1 mile of US-12 and 2.7 miles of M-51, concrete pavement repairs, building sidewalks, new traffic signals, pavement markings, and new signs.

Work this year includes temporary paving for traffic shifts and excavating in preparation of removing the two US-12 bridges over M-51. One lane will be open in each direction on the US-12 ramps to M-51, and traffic at the intersection will be maintained with a temporary traffic signal.

In 2024, excavation work will be completed and the US-12 bridges over M-51 demolished. Work to rebuild the intersection will start after that.

There will be several total closures and posted detours throughout the 2024 construction season. The public will be notified in advance as the project moves through its several phases.

There will be some restoration and landscaping work in 2025, but that will have minimal impacts on traffic.

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