San Francisco Tracker

Weeks start on Sunday. One thing is counted once per place per day, and something that runs for days counts on the day it started. Brief lane blocks that cleared inside an hour are left out, closures scheduled to run longer than a week are roadworks rather than incidents, an outage counts when it left 10 or more customers without power, and stories about policy or funding are not incidents.

Areas are the Bay's regions: Downtown and SoMa (within 2 miles of Market Street at Civic Center), the rest of San Francisco, the East Bay, the Peninsula, the South Bay (from Palo Alto south) and the North Bay (Marin and north of the Carquinez Strait). An item with no coordinates is counted in the totals but not placed on the map. Corridors come from the road a source named, as locals say it: US-101, I-80, SR-24, the Bay Bridge and the Golden Gate Bridge. Interstates are split into the stretch north, south, east or west of downtown San Francisco, since one number for a whole interstate hides where the trouble is. Supervisor districts and neighbourhoods are the City and County of San Francisco's own boundaries, from DataSF: the Board of Supervisors' eleven districts, each named here by the three neighbourhoods covering most of it, and the city's 41 Analysis Neighborhoods. They cover San Francisco only, so anything in the East Bay, on the Peninsula, in the South Bay or north of the Golden Gate belongs to neither and is not in this view.