Glenn Highway and Muldoon Road Interchange Improvements
The Diverging Diamond Interchange design requires complete reconstruction of the interchange, including two new three-lane bridges, and offers the following benefits to users:
- Improves interchange operations by reducing delay and increasing capacity.
- Minimizes disruption to traffic and business along Muldoon Road during construction because the bridges can be built while maintaining traffic on the existing structure.
- Reduces speeds through the interchange.
- Improves safety by removing opposing traffic for all left-turning and right-turning movements to and from the ramps.
- Reduces conflicts between vehicles and pedestrians by signalizing all pedestrian crossings.
- Provides a direct easy-to-use route through the interchange for bicyclists and pedestrians.
The Alaska Department of Transportation and Public Facilities (DOT&PF) is working with Neeser Construction to improve the Glenn Highway and Muldoon Road Interchange over the course of three construction seasons (2016-2018). Upon completion, the Glenn Highway and Muldoon Road Interchange will have a new diverging diamond interchange. The new interchange will have a much higher capacity for vehicles, reduce travel delays, and provide safer, more efficient pedestrian access across the highway. This project is scheduled to be completed by November 2018.
The Muldoon Road/Glenn Highway interchange is the gateway to Anchorage. It is the northernmost junction between the Glenn Highway and Anchorage’s arterial street network and it is the primary access to the Tudor/Muldoon road corridor. Constructed in the mid-1970s, the interchange is a rural, partial cloverleaf design.
Overall, land development in the north Muldoon area has caused significant traffic volume increases. Sidewalks and non-motorized trails are limited to the east side of the interchange and they often force pedestrians and bikers to travel out-of-direction to get across the interchange. As a result, some pedestrians cross at non designated locations creating unsafe conditions. Additionally, bridge clearance for trucks and large vehicles is below current minimum height standards.