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Find detailed reviews about specific areas of Washington’s transportation system in our collection of planning studies.

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65 results

Anacortes/San Juan Islands Schedule Update

Location:
Timeline: Spring 2023 - Winter 2025
  • In progress

What to know about the updated winter sailing schedule

Vehicle reservations for the winter season will be available on Oct. 29. The

Frequent Transit Service Study

Location:
Timeline: March 2022 - June 2023
  • Complete

​In its 2022 session, the Legislature directed WSDOT to conduct a study about statewide transit service benchmarks. The initial report proposed a definition of frequent fixed-route transit and documented how many people in Washington live within a half-mile walk of frequent fixed-route transit

Heritage Connectivity Trails – Phase 1 Project

Location:
Timeline: 2023-2026
  • In progress

The Heritage Connectivity Trails – Phase 1 Study will develop multi-use path connectivity options for pedestrians, bicyclists, non-motorized rolling, and equestrian travel in key, priority locations and areas of concern identified by the Yakama Nation, local communities, and WSDOT. The HCT

I-5 Bridgeport Way Pre-Design Study

Location: I-5
Timeline: March - September 2023
  • Complete
  • Pierce County

WSDOT is relocating the signal pole and utility cabinet at the intersection of Bridgeport Way and the I-5 northbound off and on ramps. The existing signal system requires frequent and extensive maintenance repairs. While planning for these improvements, the pre-design study conducted a complete

I-5 Fort Lewis Weigh Station Study

Location: I-5
Timeline: August 2020 - June 2021
  • Complete
  • Thurston County
  • Pierce County

The Fort Lewis Weigh Station located along northbound Interstate 5 near DuPont in Pierce County is in need of updating. Freight traffic in the area experiences recurring congestion and delay due to high volumes from both freight and commuter traffic. The weigh station was

I-5 Operations and Demand Analysis

Location: I-5, SR 11, SR 539, SR 542
Timeline: July 2018 - September 2020
  • Complete
  • Whatcom County

The Northwest Region Mount Baker Area is leading this effort to address several mobility challenges along segments of the I-5 corridor within the urban area of Bellingham (MP 250 to MP 258). Congestion occurs regularly during peak travel at the I-5 interchanges and on the connecting regional

I-5 Skagit Transportation Study

Location: I-5
Timeline: March 2023 - July 2025
  • In progress
  • Skagit County

I-5 between Mount Vernon and Burlington is a north – south portion of the interstate transportation network in Skagit County, powering the economy and providing a vital link to local businesses and regional markets by connecting people to jobs, goods and each other. To plan for future growth and

I-5 Study

Location: I-5
Timeline: Initial phase complete, next phase begins in early 2024
  • In progress

In Spring 2022 the Legislature initiated the Move Ahead Washington funding package to create planning and environmental linkages studies for Interstate 5. This work will ultimately create a master plan for the critical I-5 corridor that meets current and future transportation needs, and reflects

I-5 Tumwater to Mounts Road Corridor Planning and Environmental Linkages Study

Location: I-5
Timeline: Spring 2020 - Spring 2022
  • Complete
  • Thurston County
  • Pierce County

The "Planning and Environmental Linkages Study" (PEL study) built upon the goals and strategies outlined in the original 2020 Corridor Study. This PEL Study represents a collaborative and integrated approach to transportation decision-making that:

  1. Considers environmental,

I-5 Wildlife Habitat Connectivity Study

Location:
Timeline: July 2023 - TBD
  • In progress

I-5 creates a barrier to wildlife, hampering their east/west movements and leading to the death of many animals that attempt to cross it. Recent studies indicate that I-5, with daily traffic volumes between 38,000 and 68,000 vehicles across both study sites, is a large enough barrier to cause

Lower Snake River Dams Transportation Study

Location:
Timeline: January 2024 – December 2026
  • In progress
  • Statewide

The Snake River from Clarkston to Pasco contains four dams (Ice Harbor, Lower Monumental, Little Goose and Lower Granite). There has been much interest in removal of these dams for the benefit of salmon, steelhead, Pacific lamprey, bull trout, sturgeon and other native fish species. While there

North Lewis County Industrial Access Transportation Study

Location: I-5
Timeline: Sept. 2022 - Dec, 2023
  • Complete
  • Lewis County

To keep people and goods moving throughout western Washington State, the Washington State Department of Transportation is working with local stakeholders and government leaders to conduct a study to assess existing environmental and traffic conditions and reviewing new

Public Transportation Unmet Needs Study

Location:
Timeline: July 2021 - June 2023
  • Complete

In 2022, WSDOT reviewed state and regional transportation plans, interviewed 30 people made up of transportation riders, providers, and advocates, and developed an economic model to answer the following two questions:

  1. What is the unmet need for public transportation in the state

South Pierce Multimodal Connectivity Study

Location: SR 162, SR 161, SR 7, SR 507, I-5
Timeline: Spring 2022 - September 2023
  • Complete
  • Pierce County

WSDOT, in collaboration with community partners, studied a large area of south Pierce County, identifying potential projects and policies to reduce fatal and serious injury crash potential, improve travel conditions for all travelers, and provide greater system connectivity and resilience.

SR 105 West Harriman Street Signal - Roundabout Pre-Design Study

Location: SR 105
Timeline: January 2021 - May 2021
  • Complete
  • Grays Harbor County

The pre-design study looked at the signalized intersection on SR 105, South Boone Street, at West Harriman Street. The aging traffic signal at this intersection was last replaced in 1982 and is in need of replacement. The pre-design study conducted stakeholder and public outreach to examine

SR 112 Clallam Bay Pre-Design Study

Location: SR 112
Timeline: January to August 2023
  • Complete
  • Clallam County

State Route 112 at Weel Road and Eagle Crest Way is just south of Clallam Bay. This study will make recommendations for improvements at the intersection. The study will engage local stakeholders and the community to identify these improvements. Recommendations made as a result of this study will

SR 141 Bingen to White Salmon - Paving Project Complete Streets Pre-design Study

Location: SR 141
Timeline: November 2023 – Late 2024
  • In progress
  • Klickitat County

Public engagement events

We hosted our first open house 7/25/2024, public surveys closed 8/9/2024. We’ll host another open house this fall to present the proposed plans and timeline.


Following the completion of the Complete Streets pre-design study, paving work along SR 141

SR 142 - Safety and Accessibility Study

Location: SR 142
Timeline: 2019 - 2022
  • On hold
  • Klickitat County

Currently, pedestrian access along State Route 142 is limited for people who walk, bike or roll alongside the highway. With input from community members, elected officials and stakeholders, we will develop a plan to improve accessibility for all modes in the community of Klickitat. 

SR 155-SR 155 Spur Active Transportation Access Planning Study

Location:
Timeline: April- November 2024
  • In progress

This study will work with community partners to evaluate design options to connect multi-modal access and tie in pedestrian and bicycle facilities between two other projects planned on SR 155/SR 155 Spur. An open house was held in November 2023 to share information about the

SR 16 - Tacoma Narrows Bridge to SR 3 Congestion Study

Location: SR 16
Timeline: November 2016 - December 2018
  • Complete
  • Kitsap County
  • Pierce County

The study identifies corridor strategies and solutions to address congestion and traffic operations along State Route 16 between the Tacoma Narrows Bridge and Gorst, as well as portions of SR 3 and SR 304 in Pierce and Kitsap counties. 

SR 160 Long Lake Road SE Planning Study

Location: SR 160
Timeline: Fall 2016 - Spring 2018
  • Complete
  • Kitsap County

A study was completed of SR 160 between Phillips Road and Mayvolt Road Southeast/Lake Valley Road Southeast in Kitsap County. The study identified intersection control strategies that have the potential to reduce the frequency and severity of crashes at the intersection of SR 160

SR 162 Center Turn Lane Planning and Pre-design study

Location: SR 162
Timeline: April 2024 to June 2025
  • In progress
  • Pierce County

SR 162 is an important north-south link through east Pierce County. It moves people and goods and connects the cities of Sumner and Orting, and the Orting Valley. This study will use data to develop recommendations that will help improve safety, access, and mobility. During the study, WSDOT will

SR 162 Orville Road Pre-design Study

Location: SR 162
Timeline: October 2023 to March 2024
  • Complete
  • Pierce County

Information about the study, the recommended roundabout and feedback WSDOT received during the online open house is now available for

SR 162 Sumner to Orting Corridor Planning Study

Location: SR 162
Timeline: Spring 2016 - Spring 2017
  • Complete
  • Pierce County

State Route 162 is an important north-south link through the Orting Valley community and the surrounding area of southeast Pierce County. The area experiences a high level of growth and development resulting in peak hour congestion that places demands on the highway system. The study

SR 166 Bay Street/Bethel Avenue/Maple Avenue Intersection Pre-Design Study

Location: SR 166
Timeline: December 2019 - June 2020
  • Complete
  • Kitsap County

A pre-design study was conducted at the intersection of SR 166 and Bay Street, Bethel Avenue and Maple Street in Port Orchard. The existing traffic signal at this intersection has reached the end of its useful life. This in-depth review included collaboration with local

SR 167 Master Plan

Location: SR 167
Timeline: The SR 167 Master Plan started in earnest in fall 2021 and we completed the SR 167 Master Plan update in June 2023.
  • Complete
  • Pierce County
  • King County

The Puget Sound region is thriving and attracting large population and employment growth. This growth increases strain on our transportation infrastructure and services, resulting in increased traffic congestion and increased needs for maintenance and preservation. There is a need to move people

SR 20 - Discovery Road & Kearney Street Intersection Roundabouts Pre-Design Study

Location: SR 20
Timeline: Spring 2020 - Fall 2020
  • Complete
  • Jefferson County

SR 20 Skagit O'Brian Reach Feasibility Study

Location: SR 20
Timeline: January 2022 - December 2023
  • Complete
  • Skagit County

The SR 20 Skagit River O’Brian Reach Feasibility Study area is located along SR 20 near Rockport at milepost 101. This section of SR 20 experiences frequent embankment erosion and flooding and has required repeated emergency repairs following floods in the Skagit River. The purpose of the study

SR 202 - E Lake Sammamish Parkway to 244th Ave NE - Corridor Planning Study

Location: SR 202
Timeline: Summer 2018 - Summer 2019
  • Complete
  • King County

State Route 202 is an important east-west link for King County communities like Woodinville, Redmond, Sammamish, Fall City and North Bend. Thanks to growth and development, traffic on SR 202 has increased in the last decade, contributing to longer travel times for commuters and freight.

SR 202 Corridor Studies

Location: SR 202
Timeline: Fall 2020 - Winter 2022
  • In progress
  • King County

We are conducting two corridor studies along SR 202. One study will focus on safety concerns between 244th Ave. NE to 324th Ave. SE, and the second study will cover community needs between 324 Ave. SE and SR 203 in Fall City.

Both studies will document strategies to improve

166,800 electric vehicle

registrations in Washington in 2023, up from 114,600 in 2022.

87 wetland compensation sites

actively monitored on 918 acres in 2023.

25,000 safe animal crossings

in the Snoqualmie Pass East Project area since 2014.