Mount Baker Highway
"alt_name"=>"State Highway 542","hgv"=>"designated","hgv:national_network"=>"yes","lanes"=>"2","piste:difficulty"=>"easy","piste:grooming"=>"backcountry","piste:type"=>"skitour","ref"=>"WA 542","seasonal:snowfall"=>"yes","source:hgv:national_network"=>"https://www.ecfr.gov/current/title-23/chapter-I/subchapter-G/part-658;https://hepgis-usdot.hub.arcgis.com/apps/usdot::national-network-conventional-combination-trucks-map","surface"=>"asphalt"