state route constructed state highway located washington united_states highway meant serve alternate crossing cascade range seasonal pass proposals drawn 1930s highway codified law current designation construction occurred route description highway begin junction road continue east eastern terminus north highway pass near maximum altitude currently crossing similar highway covered variety including road road main reasons creating highway exist season route elevation feet closes annually dangers near pass elevation feet second allow commercial vehicles bypass mount national park prohibited current restriction commercial traffic south route white pass north interstate history plans tunnel highway date early 1930s designated pass link primary state highway state legislature appropriated thousand equivalent million study feasibility new highway early 1960s governor established committee study feasibility toll road route considered feasible committee estimated tolls vehicle equivalent need levied pay highway proponents new highway pushing routed pass away routing occurred ultimately highway built state considered highway highway codified washington law tunnel codified state law
Washington State Route 168