Final answer:
The exact multiple increase in collision risk when a driver takes their eyes off the road for 2 seconds is not provided, but it is known that the risk is significantly higher.
Step-by-step explanation:
The probability that a driver will be involved in a collision is significantly increased if they take their eyes off the road for any length of time. Though the specific multiple by which the chances of a collision are increased isn't provided in the question, studies have shown that even a 2-second distraction can significantly elevate the risk. This is a critical issue in road safety and driver behavior, as maintaining constant attention to the road is necessary to avoid accidents.