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Welcome to the website for the Seward Highway
Milepost 75-90 Rehabilitation Project

The Alaska Department of Transportation and Public Facilities (DOT&PF), in cooperation with the Federal Highway Administration (FHWA), is rehabilitating approximately 15 miles of the Seward Highway between milepost (MP) 75 near the bottom of Turnagain Pass, and MP 90 near the Girdwood intersection. This project will increase safety, extend the service life of the roadway, replace eight bridges, and repair another bridge (nine bridges in total). Currently, there are no passing lanes along this 15-mile stretch of the highway; both residents and tourists experience heavy congestion, particularly during the peak summer period.

This project includes upgrading the highway by rehabilitating the road, straightening curves in high-accident locations, improving intersections, and allowing for more passing opportunities with the addition of more passing lanes.

Project construction has been divided into two phases, with each phase taking approximately two years to complete construction.

To view the project corridors, visit our interactive map book.

Phase 1 Phase 1 Icon -No website functionality
Construction for Phase 1 is currently underway. Phase 1 is addressing poor pavement conditions from milepost (MP) 75 to 77.7 and MP 81 to 90. These segments of the highway will be repaved and repaired. In addition to the pavement reconstruction, new passing lanes will be added and three bridges will be reconstructed and one bridge repaired.  Phase 1 construction is anticipated to be completed in 2021. For more information on construction call the project hotline at (907) 269-0450 or visit

Phase 2Phase 2 Icon -No website functionality
Construction for Phase 2 is scheduled to begin in 2021 and will address the remaining portion of the road, MP 77.7 to 81. Phase 2 will consist of the realignment of curves in this segment of the highway and the reconstruction of five larger bridges.

The project area includes the Portage Glacier Road intersection, the Twenty Mile River boat launch area, and the Alaska Railroad Portage Station. As the only land connecting Whittier to communities on the Kenai Peninsula, this portion of the highway receives heavy passenger vehicle, commercial truck, and seasonal tourism industry traffic.

Interactive project segment map.

Read more about the project:

Click on the link provided in to learn more about the Portage Curve Multimodal Connector.

Project Area Map

The map above represents the proposed actions to rehabilitate the highway including proposed roadway, drainage (culverts), parking, driveway/access, and recreational improvements. Click on the image or select the Interactive Map tab at the top of our page to view each section.


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