The updated 2024 High Injury Network (HIN) map identifies San Francisco streets where the most severe and fatal traffic injuries occur. A key 100-day action in Mayor Lurie's Street Safety Initiative executive directive, the City can better understand crash trends, identify best safety interventions to reduce the risk of severe traffic injuries and fatalities.
In partnership with the San Francisco Municipal Transportation Agency (SFMTA) and the San Francisco Police Department (SFPD), the San Francisco Department of Public Health (SFDPH) collects and analyzes hospital data, vital records, and police report data to inform the City’s High Injury Network (HIN) which identifies San Francisco streets where severe and fatal injuries are most concentrated. DPH acts as the data bridge between teams that design streets and teams that respond to emergencies — providing a powerful tool in the City's toolbox to help focus resources on the neighborhoods and residents most at risk.
The High Injury Network (HIN) identifies San Francisco streets where severe and fatal injuries are most concentrated. Its primary goal is to provide the most comprehensive analysis to date of the locations where a majority of severe and fatal injuries occur, enabling the City to make more targeted street safety investments.
The HIN includes severe and fatal injuries across all police-documented travel modes. To build the HIN, we link data from police, hospital trauma, ambulence, and the office of the chief medical examiner, divide streets into corridors, map killed or severely injured (KSI) crashes, and calculate KSI per mile. Corridors with 10 or more KSIs per mile are included in the HIN.
The HIN uses four primary data sources: SF Police Department (SFPD) Interim Traffic crash data, the Zuckerberg San Francisco General Hospital (ZSFG) Trauma Registry, CA State Vital Records, and SF Emergency Medical Services (EMS) ambulance data. Police and hospital records are linked where possible, though some cases appear in only one dataset. For hospital records with missing crash location coordinates, EMS data provides the crash coordinates. All four sources are combined to produce the final HIN.