There is a newer version of the Revised Code of Washington
2005 Washington Revised Code RCW 46.61.085: Traffic control signals or devices upon city streets forming part of state highways — Approval by department of transportation.
No traffic control signal or device may be erected or maintained upon any city street designated as forming a part of the route of a primary state highway or secondary state highway unless first approved by the state department of transportation.
[1984 c 7 § 62; 1965 ex.s. c 155 § 14.]
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