Showing 2 auto-routed bicycle routes (using Map of Operatunnelen / Svartdalstunnelen graphhopper) between the two ends of the tunnel. Download gpx file: map27220212.gpx. Openstreetmap tags:
bicycle = no destination:ref = E 18 foot = no highway = trunk lanes = 2 layer = -2 maxspeed = 70 name = Operatunnelen / Svartdalstunnelen oneway = yes tunnel = yes turn:lanes = merge_to_right|merge_to_left