Except to the extent preempted by federal law, the right to fix and regulate the speed of railway trains within the limits of any city or town other than a first-class city, and at grade crossings as defined in RCW 81.53.010 where such grade crossings are outside the limits of cities and towns, is vested exclusively in the commission: PROVIDED, That RCW 81.48.030 and 81.48.040 shall not apply to street railways which may be operating or hereafter operated within the limits of said cities and towns.[ 2006 c 70 s 1; 1994 c 81 s 83; 1973 c 115 s 3; 1971 ex.s. c 143 s 1; 1961 c 14 s 81.48.030. Prior: 1943 c 228 s 1; Rem. Supp. 1943 s 10547-1.]