The transportation improvement board shall adopt rules providing for the approval of payments of funds in the accounts to a county, city, town, or transportation benefit district for costs of predesign, design, engineering, and costs of construction of an approved project from time to time as work progresses. These payments shall at no time exceed the account share of the costs incurred to the date of the voucher covering such payment.

Savings—Severability—1988 c 167: See notes following RCW 47.26.121.