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35th Avenue SW Road Safety Corridor
Three Year Collision History
Ten Year Collision History
Three Year Collision Map - North
Three Year Collision Map - South
Three Year Pedestrian and Bicycle Collision Map - North
Three Year Pedestrian and Bicycle Collision Map - South
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Safety Projects and Programs

35th Avenue SW Road Safety Corridor Project


Construction Notice/ Notificación de la Construcción

The City of Seattle Department of Transportation (SDOT) has issued a Determination of Non-significance (DNS) in accordance with the State Environmental Policy Act (SEPA) for the Vision Zero 35th Avenue SW Safety Corridor Project. The project will re-channelize 35th Avenue SW between SW Roxbury and SW Holly Streets.  Re-channelized road sections will have one lane of travel in each direction and a center turn lane.  On 35th Avenue SW, new speed and safety signs, and lane markers will be added at selected sites throughout the corridor.  Traffic signal heads and in-pavement vehicle detections will be adjusted for the new lane alignments.  Signals will be synchronized for reduced speed limits. 

Comment Deadline: 5 P.M., Friday, August 14, 2015. 

Appeal Deadline: 5 P.M., Friday, August 21, 2015. The DNS, SEPA Checklist and supporting information may be examined in the Seattle Department of Planning and Development Public Resource Center at 700 Fifth Avenue, Suite 2000, Seattle 98104, at the Southwest Branch of the Seattle Public Library located at 9010 35th Ave. S.W Seattle, WA 98126 at the High Point Branch of the Seattle Public Library located at 3411 S.W. Raymond St., Seattle, WA 98126.  Documents can be downloaded in the link below:

Project Materials


Project Overview

Project Area –35th Avenue SW between SW Roxbury Street and SW Avalon Way
The Seattle Department of Transportation (SDOT) is launching a collaborative process to review roadway conditions along 35th Avenue SW. As safety is our number one priority, we are committed to preventing collisions and improving safety for all users of the transportation system.

Together we will determine the specific nature and design elements of these changes through the process described below. New safety measures to be considered through this project will include: arterial traffic calming, traffic signal modifications, pavement repair, and pedestrian and bicycle safety enhancements. To address behavioral issues like speeding, distraction and impaired driving, we will develop targeted enforcement strategies and area-specific educational outreach.

Facts about 35th Avenue SW

  • Principal arterial roadway
  • Adjacent land uses
    • Single family and multi-family residential, commercial, industrial
    • Two libraries, two parks
    • Three schools within one block
  • Speed limit 35 miles per hour
  • Transit corridor
  • Average Daily Traffic:
    • 16,500 vehicles per day at SW Roxbury Street
    • 24,600 vehicles per day at SW Alaska Street
  • 294 collisions, 128 injuries and 2 fatalities in the last three years (2011-2014)
  • 5 fatalities in the last ten years (2004-2013)

Get Involved

A series of community meetings have been scheduled to listen to community concerns, share traffic data, and develop strategies to lower vehicle speeds and reduce collisions. These meetings are open to the general public and all are welcome. 

Somali, Vietnamese and Cambodian translators will be available at the first meeting on Wednesday, October 22nd

Download SDOT’s presentation from our first two meetings here


Conceptual Designs – November through January

SDOT will define potential roadway improvement alternatives based on community input and traffic data

Design Alternatives Review Meetings

SDOT will share conceptual improvement options and seek comments from the community

  • Tuesday, March 10, 630 to 830 PM
    Neighborhood House, Room 207, 6400 Sylvan Way SW

  • Thursday, March 12, 315 to 515 PM
    Southwest Library, Second Floor Meeting Room, 9010 35th Avenue SW

Implementation – Spring or Summer 2015

  • Short-term improvements, such as changes to signs and pavement markings, will begin
  • Design for civil improvements will begin with construction/installation in 2015
  • SDOT will develop a funding strategy for longer term improvements

Evaluation – Ongoing

  • Seek and respond to community feedback
  • Collect and evaluate speed, volume and collision data at one-year intervals
  • Make adjustments if needed

Stay Connected

The Seattle Department of Transportation is dedicated to providing frequent and timely updates throughout the process. Subscribe to email alerts to receive the latest information including public comments, recommendations, and meeting announcements.

If you have questions or would like to share your perspective on 35th Avenue SW, please contact Jim Curtin at 206-684-8874 or via e-mail at

Mayor and City Council move to enhance safety on 35th Avenue SW

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