2024 SR 520 Bridge Toll Adjustment Process

The Commission has begun its process for adjusting toll rates for the SR 520 Bridge. This page provides information on why the changes are coming, the process for doing so, and what the proposed changes will be.

Additional information will be added throughout the process, so please check back for more details in the coming months.

Current Requirements

State law (RCW 47.56.850 & RCW 47.56.870) requires tolls rates on the SR 520 Bridge to maintain travel time, speed, and reliability on the corridor, and to generate the necessary revenue to meet financial obligations.

In December, the Office of the State Treasurer determined that the current toll rates on the SR 520 Bridge will not be sufficient to meet financial obligations beginning July 2025. Therefore, the WSTC must adjust toll rates this summer, in order to generate required revenues.

Overview of Toll Rate Options Under Consideration

The WSTC is considering two different options for adjusting toll rates on the SR 520 Bridge:

Option A Under Consideration:

  • Under this approach, tolls would increase 10% across the board for all times of the day and days of the week, including weekends, rounded to the nearest nickel.
  • The toll rate adjustment would range from an increase of $0.15 to $0.45, depending on the time of day / day of week.

Option B Under Consideration:

  • Under this approach, tolls would increase by an average of 10% for the entire week, rounded to the nearest nickel.
  • There would also be fewer rate variations throughout the week, resulting in six different prices instead of the existing eight.
  • The toll rate adjustment would range from a decrease of $0.10 to an increase of $0.70, depending on the time of day / day of week.

Ways to Provide Input

Take our online survey April 17 through May 1

  • Vote on the rate change options being considered
  • Provide comments
  • Take the Survey today and share your thoughts.

Public input can also be provided via the following options through June 30, 2024: