Input
segments only
Results
Million-vehicle exposure—
Rate (RMVM or RMEV)—
Critical rate Rc—
Hot spot? (Rate ≥ Rc)—
Method
Segment RMVM = (Crashes · 10⁶) / (AADT · 365 · years · L_mi). For SI we use km — multiply by 1.609 for miles or accept rate per MVKm. Intersection RMEV = (Crashes · 10⁶) / (AADT_entering · 365 · years). Critical rate Rc = R_avg + k·√(R_avg/M) + 1/(2M), where M is exposure in millions.