Glenn Highway and Muldoon Road Interchange Improvements

Glenn/Muldoon Interchange Project Header


PUBLIC MEETING #3

Join the Alaska Department of Transportation & Public Facilities and DOWL to learn more about the Diverging Diamond Interchange and to share your opinions and concerns.

When: Wednesday May 27, 2015 from 6:00 - 8:00 PM. Presentation at 6:30 PM.

Where: Bartlett High School, Yellow Cafeteria, 1101 North Muldoon Road, Anchorage AK 99504

Click here for more information.

JANUARY 2015 UPDATE

Thank you for joining us at the 2015 Anchorage Transportation Fair on Wednesday, February 4, 2015.

Project Fact Sheet

Click here to view the project schedule.

Oregon is constructing its first Diverging Diamond Interchange. Check out this animation to see how vehicles and bikes/pedestrians move through the interchange.

Click on the graphics above to view larger

The Diverging Diamond Interchange design provides the following benefits to users:

Operations

  • Reduced delay and increased capacity.
  • Minimized disruption to traffic and businesses during construction (bridges can be built while maintaining traffic on the existing structure).

Safety

  • Reduced speeds through the interchange.
  • Removed opposing traffic from all left-turning and right-turning movements to and from the ramps.

Non-Motorized Users

  • Reduced conflicts between vehicles and pedestrians.
  • Direct route through the interchange for bicyclists and pedestrians.

THE PROJECT

The Alaska Department of Transportation and Public Facilities (DOT&PF) has determined that the Glenn Highway/Muldoon Road interchange needs to be upgraded to accommodate current and future needs. The purpose of the project is to increase safety and circulation for both cars and non-motorized traffic and to make it easier for freight trucks to travel through the interchange. The goal is to develop and implement a long term solution to address vehicle and pedestrian traffic concerns within the interchange area.

DOT&PF and its consultant, DOWL, have performed preliminary environmental and engineering and public scoping, and gathered information for traffic, safety, and noise analyses of the interchange. The Diverging Diamond Interchange has been identified as the preferred alternative (see graphics above). This design will now move forward into future environmental documentation and design with construction anticipated to begin in 2016.

Public involvement activities will continue throughout the project.

BACKGROUND

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.

Project Area Map

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 undesignated locations creating unsafe conditions. Additionally, bridge clearance for trucks and large vehicles is below current minimum height standards.

FUNDING

This project is currently state funded, however to maintain eligibility for use of federal funds, all scoping activities will be conducted in accordance with the requirements of the National Environmental Policy Act (NEPA).