Wash. Rev. Code § 46.61.605 – Limitations on backing.

(1) The driver of a vehicle shall not back the same unless such movement can be made with safety and without interfering with other traffic.
(2) The driver of a vehicle shall not back the same upon any shoulder or roadway of any limited access highway.

[ 1965 ex.s. c 155 s 69.]

Rules of court:Monetary penalty schedule—IRLJ 6.2.