SR 500 - Fourth Plain Operations Study

Project News

The Washington State Department of Transportation (WSDOT) is studying the intersection of State Route 500 and Northeast Fourth Plain Boulevard in Clark County to identify issues affecting safety, mobility, and travel reliability in the corridor. Recent data has identified SR 500 at Fourth Plain Boulevard as having the most traffic congestion and motorist delays of any highway intersection in Clark County.

Nearly 3,000 travelers provided feedback on their experience traveling through the area of SR 500 and NE Fourth Plain Boulevard through an online survey in January. This informaztion will help inform our decision-making as we identify possible solutions to improve safety, mobility and travel reliability. An online open house and in-person open house are planned for this spring for travelers to provide feedback on a draft concept list of potential improvements.

Identifying Solutions

The information from this study will help us identify a range of practical, cost-effective strategies to improve these travel conditions in the study area, with a focus on improvements that could be implemented in the next 5-10 years. A Technical Advisory Committee (TAC) including representatives from the City of Vancouver, Clark County, C-TRAN and the Southwest Regional Transportation Council will help evaluate each potential strategy based on its effectiveness, cost-benefit, and ease of implementation.


  • Jan. 2019: Online survey for public input conducted
  • May 2019: In-person and online open houses to present list of potential concepts for community review and feedback
  • Summer 2019: Study scheduled to conclude


The study is being funded through the regional Emergent Needs program. While no funding is currently identified to implement improvements on SR 500 and NE Fourth Plain Boulevard, having a list of projects and their predicted costs will allow us to act quickly when appropriate funding becomes available. It may also help improve coordination with local partners as they develop their own transportation plans.


Judith Perez