Here speeding is defined as driving too fast for the conditions.
The faster you go, the more likely you are to crash and the greater your risk of serious injury or death. No matter what causes a crash, vehicle speed directly affects the force of impact.
Speed and crash risk
As speed increases, there is an increase in the following factors and, in turn, an associated increase in the risk of crash involvement (Patterson, Frith and Small, 2000):
- Stopping distance — both the distance travelled during reaction time and the distance travelled after the brakes are applied
- The probability of exceeding the critical speed on a curve
- The chance of other road users misjudging how fast the speeding driver is travelling
- The probability of a rear-end crash if the driver has not accounted for the increased speed by increasing the following distance.