Imposes tolls simultaneously on the state route number 520 floating bridge and the Interstate 90 floating bridge to: (1) Help finance construction of critical safety projects, including increasing capacity in the east-west corridor across Lake Washington with the replacement of the state route number 520 floating bridge;

(2) Generate additional funds to help finance associated projects in the state route number 520 corridor program; and

(3) Guarantee travel time, speed, and reliability for individuals crossing Lake Washington by way of either state route number 520 or Interstate 90.

Provides that, unless otherwise delegated, the department of transportation is the state toll agency with the authority to administer tolling programs on eligible toll facilities, including the state route number 520 corridor and the Interstate 90 floating bridge.

Creates a special account to be known as the Lake Washington transportation corridor account.