1. Accident Rate: This is the number of accidents per million vehicle miles traveled.
2. Fatality Rate: This is the number of fatalities per million vehicle miles traveled.
3. Injury Rate: This is the number of injuries per million vehicle miles traveled.
4. Vehicle Miles Traveled: This is the total number of miles traveled by vehicles in a given period of time.
5. Seat Belt Usage: This is the percentage of drivers and passengers wearing seat belts while traveling.
6. Average Speed: This is the average speed of vehicles traveling on a roadway.
7. Roadside Inspection Rate: This is the percentage of vehicles inspected for safety violations.
8. Alcohol-Related Accident Rate: This is the number of alcohol-related accidents per million vehicle miles traveled.
9. Traffic Volume: This is the number of vehicles traveling on a roadway in a given period of time.
10. Congestion: This is the degree of difficulty in traveling on a roadway due to the volume of traffic.