23rd Avenue Corridor Improvements Project
Updated March 22, 2017
23rd reopened to two-way traffic, final close-out work
Crews have continued making good progress rebuilding 23rd Ave since construction began in June 2015. On February 28, 2017, crews reopened 23rd Ave to two-way traffic, which marks the completion of the majority of construction work for Phase 1. Crews will work to finish minor close-out activities through spring 2017.
Construction contact information
If you have questions during construction, please contact us via phone or email:
The 23rd Avenue Corridor Improvement project includes three phases:
Phase 1: S Jackson St to E John St: June 2015 – spring 2017; major construction activities completed, minor close-out activities in progress
Phase 2: S Jackson St to Rainier Ave S – We will share the design and schedule for Phase 2 in late spring / early summer 2017
Phase 3: E Roanoke St to E John St – Scope and schedule to be determined
For a good introduction to the project, be sure to check out our overview video.
23rd Ave is an essential arterial that connects a variety of users to businesses, educational institutions and residences in the Central District and beyond. Approximately 13,400-20,000 vehicles use 23rd Ave each day. This area also serves high volumes of pedestrians, bike riders, and transit users (approximately 6,000 daily transit riders).
Why construct improvements on the 23rd Ave corridor?
Before the start of construction, the 23rd Ave corridor was in poor condition, including:
Improving safety and mobility in your neighborhood
In June 2015, the Seattle Department of Transportation (SDOT) began construction on 23rd Avenue between S Jackson St and E John St. This is the first phase of a project to improve safety and mobility for people who drive, walk, bike and take transit in the area.
Project improvements vary by phase and include:
The new roadway –opportunity for a safer 23rd Ave
The new corridor will have wider lanes – one in each direction – plus a 10-foot-wide center turn lane. The turn lane will allow left-turning vehicles to make a safe left turn, while still allowing thru-traffic to continue through an intersection and down the street.
On streets with 25,000 vehicles per day or fewer, such as 23rd Ave, changing the street design from four lanes to three can increase safety by reducing collisions, reducing speeding, allowing vehicles to turn without blocking traffic, managing drivers cutting in and out of lanes, creating space for wider sidewalks, making streets easier to cross and making it easier for freight and transit to travel. At most bus stops, the road will flare to approximately 18 feet, where buses can pull to the side and vehicles can pass the stopped bus in the travel lane. The City is also working with King County Metro to determine the benefits of electrifying the Route 48 line. The results from the study can be found in the Project Materials section below.
SDOT is committed to engaging with the community and responding to community needs in the project area. Please stay tuned for more information about future public engagement opportunities, and contact us if you would like to request a community briefing.
Previous translated materials
SDOT has a total of $43 million in funding through a combination of local, state and federal sources. Phase 1 is estimated to cost approximately $31 million and is fully funded. SDOT has sufficient funding for Phase 2 and 3 design; however, additional funding is needed for Phase 2 and 3 construction.
Call the project information line: 206-727-8857
If you need this information translated, please call (206) 727-8857.