The Illinois State Police has a page on Illinois motorcycle safety and accident statistics (pdf)
Some excerpts from this page include:
- In recent years, motorcycle fatalities have risen 52% in Illinois, while motorcycle registrations have risen 53%.
- Weather and roadway surface conditions are generally not factors in fatal motorcycle crashes. Approximately 95% of all fatal motorcycle crashes occur in clear weather, on dry pavement.
- The three driver-related factors reported most frequently for fatal motorcycle crashes were:
- Driving too fast for conditions or in excess of the posted maximum speed limit
- Driving under the inﬂuence of alcohol, drugs, or medication
- Improper lane usage
- Motorcyclists (operators and passengers) killed in recent years accounted for more than 12% of all motor vehicle fatalities. Motorcycle registrations, however, accounted for less than 3% of all motor vehicles registered.