San Francisco’s first digital bicycle counter was activated on Bike to Work Day yesterday, and the day’s official total was 3,231 cyclists on Market Street. But that’s probably a significant underestimate, since many bike riders on that block choose to ride outside the bike lane where the ground sensors were installed. Many riders seem to prefer to ride in the adjacent traffic lane, which was closed to cars in 2009.

The SF Bicycle Coalition says Market is the busiest bike street west of the Mississippi. Meanwhile, Copenhagen claims the busiest bicycling street in the western world — Nørrebrogade, which sees over 36,000 bicyclists a day. So, can San Francisco catch up?

You don’t have to head to Market Street to keep track of the bicycle count — the SFMTA has a regularly-updated tracker online.