Washington Revised Code Title 47. Public Highways and Transportation § 47.56.862. State route number 99, deep bore tunnel--Tolls authorized--Eligible toll facility--Toll revenue--Toll rate schedule

(3)(a) In setting toll rates for the deep bore tunnel portion of state route number 99 pursuant to RCW 47.56.850, the tolling authority shall set a variable schedule of toll rates to maintain travel time, speed, and reliability on this facility and generate the necessary revenue as required under (b) of this subsection.

(b) The tolling authority may adjust the variable schedule of toll rates at least annually to reflect inflation as measured by the consumer price index to meet the redemption of bonds, to meet the obligations of the tolling authority under RCW 47.56.850, and interest payments on bonds and for those costs that are eligible under RCW 47.56.820.