Wikipedia talk:WikiProject U.S. Roads/Washington/List of pre-1964 highways

According to, the following numbers were added after 1964 (the highway numbers were used officially until 1970):
 * SSH 1F, I-5 exit 250 to SR 11 (SR 110), now part of SR 11
 * SSH 2K, SR 906
 * SSH 3G, SR 193
 * SSH 3U, SR 232
 * SSH 3V, SR 241
 * SSH 11I, SR 170
 * SSH 16A, Okanogan to Omak