Fast facts: 

• MDOT will proceed with building a diverging diamond interchange (DDI) at I-75 and 12 Mile Road in Oakland County.      
• This innovative design will provide safety benefits for motorists and nonmotorized users.   
• Rebuilding the interchange is expected to begin in late February 2022.    

The Michigan Department of Transportation (MDOT) will proceed with building a diverging diamond interchange (DDI) at I-75 and 12 Mile Road in Madison Heights. The decision to change to this innovative interchange design was approved by the Federal Highway Administration (FHWA) in late 2021. The interchange is part of the ongoing I-75 modernization project in Oakland County. DDIs were recently built at Big Beaver and 14 Mile roads along I-75, and the design is preferred by the Road Commission for Oakland County and the City of Madison Heights.        

The existing 12 Mile Road interchange at I-75 is outdated with prevalent peak-hour congestion. The new interchange will be brought up to modern design standards and will improve capacity and safety by replacing loop ramps with longer slip ramps, and will incorporate two-phase signals at the I-75 ramps that will minimize signal changes and reduce the potential for crashes. The DDI also will reduce the number of conflict points on 12 Mile Road for motorists looking to either access or leave the freeway, leading to further safety benefits for drivers and non-motorized users. More information about DDIs is available online.  

The rebuilding of 12 Mile Road and the new interchange is expected to begin in late February. During the rebuilding phase, all ramps at the interchange will be closed and through-traffic on 12 Mile Road will be detoured between Stephenson Highway and Dartmouth Street. Access to businesses will be maintained.  

Press Release

Fast facts: 

• Preliminary work starts Saturday on portions of I-75 in Madison Heights ahead of full-scale rebuilding that will begin later this winter.      
• On Saturday, crews will close the northbound I-75 exit to 11 Mile Road, and the Lincoln Avenue overpass above the freeway.  
• The eastbound and westbound I-696 ramps to northbound I-75 will be closed for the weekend.  

Weather permitting, contract crews will begin preliminary work on portions of I-75 in Madison Heights. This work is affiliated with the ongoing I-75 modernization project in Oakland County. This year, crews will rebuild northbound I-75 pavement, ramps and bridges from I-696 to 13 Mile Road.      

Starting at 5 a.m. Saturday, Jan. 15, crews will close the northbound I-75 exit ramp to 11 Mile Road to begin retaining wall building. During the ramp closure, northbound I-75 traffic will be detoured to 14 Mile Road until mid-November. In addition, crews will close the Lincoln Avenue overpass above I-75 to relocate a sewer line ahead of the eventual bridge replacement work scheduled this year.     

For the weekend, crews will close the eastbound and westbound I-696 ramps to northbound I-75 to complete the demolition of the bridge supports on the previous Dallas Avenue overpass. The ramp closure is scheduled to begin at 5 a.m. Saturday and reopen by 5 p.m. Sunday, Jan. 16.   

Press Release

Eastbound 12 Mile Road to northbound I-75 will be closed on Thursday, January 13^th from 9:00 a.m. to 3:00 p.m. as crews repair damaged guardrail.

Watermain repair on the service drive will require the southbound I-75 exit ramp to 9 Mile Road to close starting at 5 a.m. Friday, Jan. 7 until 7 p.m. Saturday, Jan. 8.

Traffic can use the southbound I-75 exit to 8 Mile Road during the closure.

The ramp from eastbound 12 Mile Road to northbound I-75 will be closed on Thursday, December 9^th from 9:00 a.m. to 3:00 p.m. as crews repair a guardrail that was recently damaged.