There are plenty of sharrows in the US https://wiki.openstreetmap.org/wiki/Key:cycleway#Shared_cycle_lanes I can't find a map that shows them. Not https://www.opencyclemap.org/ or the "cycle map" layer at osm.org |
cycle.travel shows them in its generic purple-dots-for-cycle-lane style: https://cycle.travel/map?lat=45.5399&lon=-122.6639&zoom=17 |