The following sections of the Revised Code of Washington (RCW) pertaining to speed restrictions as now or hereafter amended are hereby adopted by reference as a part of this chapter in all respects as though such sections were set forth herein in full: RCW 46.61.400, 46.61.415, 46.61.419, 46.61.425, 46.61.427, 46.61.428, 46.61.435, 46.61.440, 46.61.445, 46.61.450, 46.61.455, 46.61.460, 46.61.465, and 46.61.470.