Welcome to the website for the Seward Highway: O'Malley Road to Dimond Boulevard project. The Alaska Department of Transportation and Public Facilities (DOT&PF) will use this site to keep you informed about project development. Please refer to this site for updates on the project, documents, announcements of public meetings, and to make a comment or suggestion.
This is the third in a series of projects to improve capacity, safety, access, and connectivity on the Seward Highway between Rabbit Creek Road and 36th Avenue.
Current (35%) design includes the following proposed elements:
These proposed improvements will:
This project will include public and stakeholder involvement and coordination with adjacent projects such as the Seward Highway: Dimond Boulevard to Dowling Road Project (DOT&PF, in construction) and the Academy/Vanguard Drive Traffic Circulation Improvements (Municipality of Anchorage [MOA] project).
What's a Diverging Diamond Interchange?
Diverging Diamond Interchanges (DDI) are an innovative, proven solution for improving safety and mobility at interchanges. DDIs have been shown to:
Aerial - Project Overview: (Click to enlarge)
Interchanges - 35% Design: (Click on image to enlarge)
Dimond-Abbott O'Malley Road Scooter-Academy
Diverging Diamond Interchange Diverging Diamond Interchange Roundabout Interchange
Video Links Illustrating DDIs
Purpose and Need
The purpose of the proposed action is to construct improvements to the Seward Highway corridor between Rabbit Creek Road and 36th Avenue to address current and future travel demands and mobility needs. The improvements provide additional capacity, connectivity, and safety enhancements. Existing peak-hour congestion in the study area is expected to worsen, as indicated by the regional growth and economic development projections described in Anchorage 2020: Anchorage Bowl Comprehensive Plan (MOA, 2001) and the Anchorage Bowl 2025: Long Range Transportation Plan (MOA, DOT&PF, and Anchorage Metropolitan Area Transportation Solutions [AMATS], 2007). Upgrades and additional connections to the Seward Highway will provide needed capacity to meet the travel demands generated by growth in the region.
It is anticipated that more than 90% of the funding for the Seward Highway: O’Malley Road to Dimond Boulevard Project will be federally funded and developed in accordance with Federal Highway Administration (FHWA) guidelines. At this time, construction is projected to cost approximately $80-100 million.
Between 2001 and 2007 the DOT&PF conducted an Environmental Assessment on the environmental impacts of making improvements to the Seward Highway in Anchorage. The analysis resulted in an Environmental Assessment – Finding of No Significant Impact that was signed by the Federal Highway Administration in February 2007. Preliminary engineering determined the highway should be improved in sections. Design and construction of the segment from Tudor Road to Dowling Road was completed in 2013. Design of the Dowling Road to Dimond Boulevard segment is complete and construction is anticipated to start in 2017. The segment from O’Malley Road to Dimond Boulevard is the next to enter the detailed design phase.
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IRIS Project No. CFHWY00012
Federal Project No. 0537(008)
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Department of Transportation & Public Facilities
PO Box 112500
3132 Channel Drive
Juneau, Alaska 99811-2500
Phone: 907-465-3900 || 907-586-8365 (FAX)