Oklahoma motorcycle crash data

OHSO's 2021 Oklahoma severity totals report 1,285 motorcyclists involved. Of that person-count denominator, 76 were killed (5.9%) and 276 were seriously injured (21.5%). These are motorcyclists involved, not 1,285 unique crash events. Source: pp. 63-65, statewide county and highway-class severity tables.

OHSO separately reports 1,143 motorcycle-involved crash events statewide in 2021. The 1,143 crash-event total and the 1,285 motorcyclist person count use different units and are not interchangeable denominators. Source: p. 74, motorcycle-involved crashes table.

On OHSO's 2021 Oklahoma highway-class table, city streets account for 523 of 1,285 motorcyclists involved (40.7%), the largest listed class but not a majority. Interstate highways account for 142 of 1,285 involved (11.1%) and 12 of 76 killed (15.8%). These raw counts are not exposure-adjusted and do not establish that interstates were disproportionately dangerous. Source: p. 65.

On OHSO's 2021 Oklahoma month and day charts, May through September account for 764 of 1,285 motorcyclists involved (59.5%), while Saturday and Sunday together account for 484 of 1,285 (37.7%). These are raw person counts, not rates adjusted for riding exposure by month or day, so they do not show that warm months or weekends were riskier per mile or trip. Source: p. 66.

For 2021 Oklahoma fatalities with helmet use known, 53 of 67 motorcyclists killed were not using a helmet (79.1%); helmet use was unknown for 9 of all 76 fatalities and those 9 are excluded from the percentage. This single-year share is not exposure-adjusted and does not establish cause or legal responsibility. Source: pp. 72-73.

All percentages above describe one calendar year of Oklahoma crash records. They are not multi-year rates and are not adjusted for miles ridden, trips, rider population, weather, road-class exposure, or day-of-week exposure.