Next stage of US-31 rebuilding project, detour near Interlochen to begin next week

TRAVERSE CITY, Mich. - The Michigan Department of Transportation's (MDOT) project to rebuild a 7.8-mile section of US-31 from Sullivan Road in Green Lake Township, Grand Traverse County, to Reynolds Road in Inland Township, Benzie County, is expected to advance to the next stage of construction June 2 or 3, depending on the weather. Crews will be finishing some work on the north side of US-31 east of the South Long Lake Road/J. Maddy Parkway intersection after the stage change.

This $32.5 investment includes rebuilding and widening the road to improve pavement condition and provide safety improvements with the addition of center left-turn lanes, widened paved shoulders and rumble strips. The South Long Lake Road/J. Maddy Parkway intersection is being rebuilt as a roundabout.

Counties:
Grand Traverse and Benzie

Highway:
US-31

Closest community:
Interlochen

Estimated start date:
Tuesday, June 2, 2026

Estimated end date:
Friday, Nov. 13, 2026

Traffic restrictions:
During this phase of the project (expected to continue into July), the south side of US-31 will be rebuilt between Sullivan Road and west of J. Maddy Parkway/S. Long Lake Road, including building the roundabout. Southbound US-31 traffic will be maintained on US-31, while northbound US-31 traffic will be detoured on Gonder Road, Riley Road, J. Maddy Parkway, Youker Road and County Road 633.

J. Maddy Parkway access to US-31 will be closed for most of this phase of construction. South Long Lake Road access to US-31 will be open to southbound US-31 traffic only, with other traffic detouring on West Silver Lake Road and Secor Road.

During the final phases of construction (July through November), crews will be rebuilding US-31 from west of the South Long Lake Road/J. Maddy Parkway roundabout to Reynolds Road. Southbound US-31 traffic will be maintained on US-31, while northbound US-31 traffic will be detoured on Reynolds Road, Cinder Road, Diamond Park Road, Gonder Road, Riley Road and J. Maddy Parkway.

Visit MDOT's project website for detour route maps.

Jobs numbers:
Based on economic modeling, this investment is expected to directly and indirectly support 275 jobs.

Safety benefit:
This project will improve safety for all users of the highway with the introduction of a new roundabout, a center left-turn lane and widened paved shoulders.