Shared lane marking

A shared-lane marking in Toronto, Ontario, Canada. Note that the cyclist is not properly positioned on the roadway; they are in the door zone of the parked car and vulnerable to being "doored". Cyclists should ride over the sharrow.
A shared-lane marking in Toronto, Ontario, Canada

A shared lane marking, shared-lane marking, or sharrow is a street marking installed by various jurisdictions worldwide in an attempt to make cycling safer.