Establishes the eastside corridor congestion relief act.

Authorizes the department of transportation to designate one lane of traffic moving in each direction on interstate 405 as a high occupancy vehicle lane to be used by certain vehicles.

Requires the department of transportation, to the extent applicable, to create a fourth general purpose lane of traffic moving in each direction on interstate 405.

Repeals the interstate 405 express toll lanes operations account.

Requires any residual funds remaining in the account to be transferred to the motor vehicle fund to be used to construct new lanes on interstate 405.