Welcome to the Dowling Road/Seward Highway Interchange Reconstruction website.
The team’s evaluation of multiple interchange types is documented in the Draft Preliminary Engineering Report. Two interchange types were selected for further consideration, a signalized tight diamond and a compressed diamond with roundabouts. Both meet the forecasted capacity of the interchange, include access to local residents and businesses, and enhance non-motorized facilities.
WANT TO TALK ABOUT THE PROJECT?
Public Involvement Coordinator
Call: (907) 272-1877
Preliminary engineering, environmental, and design efforts will proceed on the schedule outlined below.
January 2018 to July 2019: Dowling Road Interchange Public Involvement
February 8, 2018: Anchorage Transportation Fair
June 27, 2018: Public Meeting/Release of Draft Preliminary Engineering Report
February 2019: Anchorage Transportation Fair
July 2019: Public Meeting/Plans, Specifications, & Estimate
January 2018 to November 2019: Environmental Activities & Permitting
January 2018 to August 2018: Preliminary Engineering Report, including Traffic & Safety Analysis
August 2018 to December 2018: Design Study Report
August 2018 to November 2019: Plans, Specifications, & Estimates
2020 to 2021: Construction
This project will reconstruct the Dowling Road/Seward Highway interchange. The goal is to improve safety, serve both motorized and non-motorized travelers, be cost-effective, and be easy to maintain. The reconstructed interchange will accommodate projected traffic through 2040.
This photo shows the existing Dowling Road and the transmission line (shown in red) adjacent to it. The yellow lines show existing DOT&PF right-of-way.
Constructed in 2003, the existing roundabout interchange replaced two traffic signals with Alaska’s first multilane roundabouts and converted Dowling Road from a substandard two-lane road to five lanes. The roundabouts were designed to meet projected 2020 traffic volumes and the current traffic volumes at some of the approaches now exceed those projections, resulting in longer wait times. There were also right-of-way, utility, and other constraints that were limiting factors during the original design. The Alaska Department of Transportation and Public Facilities has since implemented safety fixes to solve some problems with the existing interchange and acquired additional right-of-way.
Open House, June 27, 2018
- Appendix A Preliminary Design Criteria - 95 KB
- Appendix B Worksession Meeting Minutes and Presentation - 7.5 MB
- Appendix C Construction Cost Estimates / Estimated construction cost between $30,000,000 and $40,000,000
- Appendix D Preliminary Traffic and Safety Report - 7.9 MB
- Appendix E Roundabout Operations Memorandum - 9.6 MB
- Appendix F Public Involvement Plan - 1.1 MB
- Appendix G Bridge Selection Memorandum - 3.3 MB
- Appendix H Tight Diamond Interchange Alternative Plans - 7.5 MB
- Appendix I Roundabout Interchange Alternative Plans - 8.2 MB
LINKS TO AREA PROJECTS
FOR MORE INFORMATION
For questions or comments email or call Anne Brooks, Public Involvement Lead at firstname.lastname@example.org
Kevin Jackson, P.E.
Lounsbury & Associates, Inc.
Joe Taylor, P.E.,
Brooks & Associates
Anne Brooks, P.E.
Public Participation Coordinator