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The Diverging Diamond Interchange located at Auburn Hills, MI’s I-75 and University Drive improves traffic flow and safety.
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The Diverging Diamond Interchange located at Auburn Hills, MI’s I-75 and University Drive improves traffic flow and safety.
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The Diverging Diamond Interchange located at Auburn Hills, MI’s I-75 and University Drive improves traffic flow and safety.
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The main entryway to Auburn Hills, MI, redesigned by OHM Advisors, allows pedestrians to cross the bridge over I-75 safely.
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The main entryway to Auburn Hills, MI, redesigned by OHM Advisors, allows pedestrians to cross the bridge over I-75 safely.
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The Diverging Diamond Interchange located at Auburn Hills, MI’s I-75 and University Drive improves traffic flow and safety.

I-75 at University Drive Diverging Diamond Interchange

Client

City of Auburn Hills
Michigan Department of Transportation

Location

Auburn Hills, MI

Michigan’s First DDI Reduces Traffic Congestion, Improves Traveler Safety

A collaboration with the Michigan Department of Transportation (MDOT) and the City of Auburn Hills, our multi-disciplinary team participated in this $25 million reconstruction project at the interchange of I-75 and University Drive. For years, this intersection, the main entryway to Auburn Hills’ high-tech corridor including Oakland University and Chrysler’s North American headquarters, caused congestion that significantly backed up interstate traffic and posed safety risks for all travelers. Several years prior to funding becoming available for the project, OHM Advisors had proposed redesign options to MDOT for the area, which included a Diverging Diamond Interchange (DDI)—at the time, a relatively new geometric concept requiring drivers to briefly cross to the opposite side of the road at carefully designed crossover intersections. In the ultimate, fully-funded project, MDOT and the city chose to utilize this innovative plan through a design-build process.

OHM Advisors provided various services to the project, including a preliminary conceptual risk assessment prior to RFP development, which included extensive public education and engagement, and multi-agency coordination. Our experts performed operational engineering studies and analyses, created the preliminary design and geometrics, and incorporated designs for preliminary drainage and maintenance of traffic during construction. Our urban design and landscape architecture teams added enhanced lighting, aesthetic streetscape features and a community-branded interchange bridge that was the first of its kind in the state. The transformative, award-winning DDI alleviates congestion and improves traffic flow, allows pedestrians and other non-motorized traffic to safely cross the bridge, preserves a wetland area parallel to freeway, and has the potential to provide sweeping economic benefits to a fast-growing region—all for millions less than conventional interchange rehabilitation methods.

Project Highlights: transportation engineering, DDI, bridge, traffic engineering, aesthetic enhancements, street lights, multi-agency coordination, DOT, engineering design, bridge design, traffic signal design, pedestrian signal design, utility coordination, public engagement, MDOT practices & procedures

Awards & Recognition