Glenn Highway and Muldoon Road Interchange

Close to Anchorage and south of the Eagle River, Glenn Highway intersects Muldoon Road, an access point to a large residential suburb and the primary bypass for traffic east of Anchorage. Finished in 2018, general contractor Neeser Construction, Inc. reconstructed the partial cloverleaf into a safer and higher capacity diverging diamond interchange, requiring two new, 3-lane bridges with Reinforced Earth mixed abutments and retaining walls.

A Diverging Diamond Interchange (DDI) is an interchange in which the two directions of traffic on the non-freeway road cross to the opposite side on both sides of the bridge.

A Diverging Diamond Interchange (DDI) is an interchange in which the two directions of traffic on the non-freeway road cross to the opposite side on both sides of the bridge. A traffic light is typically used at the crossover. It is unusual in that it requires traffic to briefly drive on the opposite side of the road. The purpose is to improve safety and traffic flow on and off the freeway.