Final answer:
An effective intervention to avoid fast driving is to make a contract not to drive more than 55 miles per hour and drive with the CD player turned off.
Step-by-step explanation:
An effective intervention to avoid fast driving would be to make a contract not to drive more than 55 miles per hour and drive with the CD player turned off. This intervention sets a clear limit on the speed and eliminates distractions that can contribute to fast driving.
By setting a maximum speed limit and removing potential distractions, such as listening to music, the driver is encouraged to drive at a safe and controlled speed. This intervention promotes responsible driving behavior and reduces the risk of accidents caused by excessive speed.