4th Ave S is a principal arterial through the industrial SODO neighborhood in Seattle. At S Walker St, 4th Ave S has 2 southbound general-purpose lanes, 3 northbound general-purpose lanes, and a center-left turn lane. Existing conditions at the intersection include substandard pedestrian facilities, limited buffer space between pedestrians and the roadway, and an unsignalized intersection. The nearest signalized crossings are 800 north or 750 south.4th Ave S and S Walker St features a pair of bus stops served by King County Metro Routes 131 and 132, both on the south side of the intersection. Later Metro will relocate the northbound bus stop to the north side. Sound Transit will start early construction on the West Seattle Link Extension by 2027. The new light rail alignment will replace an existing bus-only street known as the SODO Busway. The buses that currently run on the Busway will be relocated to 4th Ave S. This will increase the number of buses on the corridor from 170 revenue trips per day to 986 revenue trips plus an additional 506 deadhead buses. Also, Sound Transit will construct a maintenance access road parallel to its new light rail alignment, which will be accessed via 4th Ave S at S Walker St, along with a pilot Freight and Bus lane (FAB) in the northbound direction on 4th Ave S (including this intersection). Later, Metro also anticipates upgrading a route to RapidRide status on 4th Ave S.
Projects — TIB Project Information
TIB Project Information
City of Seattle's 4th Avenue S and S Forest Street Signal
8-1-101(161)-1
8-1-101(161)-1
4th Avenue S and S Forest Street Signal
Intersection
FY 2027 Urban Arterial Program
Current Phase : Design
Total TIB Funding : $1,318,675
County: King | Legislative District: 34 | Project Length: 0.04 | TIB Engineer: Greg Armstrong | Last Payment Date:
Project Information
| Lead Agency | SEATTLE |
| Funding Year | 2027 |
| Program | UAP |
| Current Phase | Design |
| Legislative District | 34 |
| Congressional District | 7 |
| Federal Route Number | 1587 |
| Project Length | 0.04 mi. |
| ADT | 20,782 |
| Functional Class | Principal |
| Type of Work | Traffic Control |
| Project Contact | Jim Storment |
| Contact Email | jim.storment@seattle.gov |
| TIB Engineer | Greg Armstrong |
| Last Payment Date | |
| Cultural Resource Assessment | CRA |
Project Schedule
| Target Date | Actual Date | |
|---|---|---|
| Project Selection Date | 11/21/2025 | |
| Delayed Project Date | 07/01/2030 | |
| DAHP Assessment Date | 01/27/2026 | |
| Predesign Approval | ||
| Design Approval | 05/01/2026 | 04/29/2026 |
| Bid Auth. Approval | 08/01/2026 | |
| Construction Approval | 10/01/2026 | |
| Project Closeout | 09/30/2027 | |
| Audit Date | ||
| Withdrawn Date |
Project Funding
| TIB Funds | Project Costs | |
|---|---|---|
| Environmental Study | 0 | 0 |
| Design Study | 0 | 0 |
| Total Predesign | 0 | 0 |
| Special Study | 0 | 0 |
| Design | 235,549 | 396,800 |
| Right of Way | 0 | 0 |
| Total Design | 235,549 | 396,800 |
| Construction Engineering | 79,545 | 134,000 |
| Construction Contract | 1,003,581 | 1,690,609 |
| Other Construction | 0 | 0 |
| Total Construction | 1,083,126 | 1,824,609 |
| Total TIB Funding | 1,318,675 | 2,221,409 |
Local Funding Partners
| Funding Amount | Percent | |
|---|---|---|
| SEATTLE | 902,734 | 40.6% |
| WSDOT Funding | 0 | 0.0% |
| Total Local Funding | 902,734 | 40.6% |
Project Description
The Seattle Department of Transportation is proposing several improvements at the intersection to address the concerns noted above. The improvements include a new full signal at the intersection, curb bulbs, bus bulbs, upgraded ADA curb ramps, marked crosswalks, landscaping, and improved drainage. The new signal will assist with business access, ensure transit users have a controlled crossing to access bus stops, and provide capability for future transit signal priority when the SODO Busway is closed and buses are relocated to 4th Ave S. The new curb and bus bulbs at each corner at 4th Ave S and S Walker St will shorten the pedestrian crossing distance and help to achieve Vision Zero design recommendations. The bus bulbs will improve the experience for transit riders, as well as general pedestrian access, by giving riders more space to wait for buses, away from the regular sidewalk. The bus bulbs will also help with transit speed and reliability by allowing buses to make in-line stops.Marked crosswalks will increase the visibility of people walking/rolling and better alert drivers that pedestrians are present. New landscaping will better separate people walking/rolling along the corridor from people driving. The new ADA curb ramps will improve accessibility for road users of all abilities.
Existing Condition
Project Benefits
- Improves safety;
- Improves pedestrian safety;
- Removes ADA barriers
Project Pictures
No images available.
Project Delays
| Delay Type | Resolution Date | Comments |
|---|---|---|
No delayed project history. |
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