Traffic Fatalities When Street Lights Are On

Total fatalities during streetlight operating hours, 2001-2024

Source: NHTSA FARS, enriched with solar phase data via Photometrics AI Phase Calculator

All fatalities Time-adjusted % of fatalities when streetlights on
(normalized to equal hours) Motorist Non-motorist

"Streetlights on" determined by solar phase at each crash's GPS coordinates and timestamp. Streetlights operate from the beginning of nautical dusk to end of nautical dawn (sun > 6° below horizon in the morning and evening).