Accident risk of PTW decreases with vehicle age. Accident risk of passenger cars is increased for new (<2 years) and old (>10 years) vehicles. Accident risk outside buitl-up areas at nights or at weekends is much higher, especially for PTW’s. 

Accident risk of young drivers is 4 times the average for car drivers and 5 times the average of PTW riders. Drivers >65 years old are at increased risk, especially when riding mopeds or motorcycles. Accident risk decreases with driving experience. Vehicle age <1 year or >10 years is associated with increased accident risk. Male drivers (especially young ones) have much higher accident risk than females.