I-75 at University Drive Interchange Re-evaluation - Auburn Hills


MDOT is re-evaluating the Environmental Assessment for improving 5.4 miles of I-75 from South Boulevard northerly to the M-24 Connector in Oakland County. The re-evaluation is considering the environmental changes, new laws and regulations, and design changes since the initial study cleared the way for freeway and related local road improvements supporting the Chrysler Tech Center and other developments. While most of the work has been completed, the centerpiece of the re-evaluation is a proposed Diverging Diamond Interchange (DDI) for replacing the current University Drive interchange in Auburn Hills. The innovative DDI uses a narrower bridge, no large loop ramps, and 97 percent less additional land compared to the previously cleared, more expensive partial cloverleaf design.

Other Diverging Diamond Interchange Advantages:

♦ Reduced delays
♦ Lower speeds
♦ Low conflict points
♦ Increased acceleration distance on I-75 for WB University to SB I-75
♦ Two-phase signals at the crossing intersections requires shorter cycle lengths
♦ Improved operations at the University Drive/High Meadows
♦ Direct access from Chrysler Drive to NB-I-75 without stopping at University Drive signal

Aerial map showing proposed Diverging Diamond Interchange at I-75/University Drive

Diverging Diamond Interchange simulation
The Missouri Department of Transportation has constructed several DDIs in their state.
This link is a simulation of a DDI in Missouri.

Your input is important as MDOT considers the impacts the improvements would have on the human and natural environments.

To comment on the study, contact:

Anita Richardson
Public Hearings Officer
Michigan Department of Transportation
425 W. Ottawa, P.O. Box 30050
Lansing, MI 48909
Fax: 517-335-5696