What is the best way to figure out how many seconds of following distance you have

a. Wait until the vehicle ahead of you passes a shadow or landmark. Then count the seconds until you reach it.
b. Use the stopwatch on your cell phone to determine how long it takes you to reach a mile marker after the vehicle in front of you has passed it.
c. Get 1/4 closer to the car in front of you, then back off again. Multiply how long this took you by four to give the following distance.
d. Send a text message to a friend to text you back in ten seconds. See how far you have traveled in that time.


Answer: a. Wait until the vehicle ahead of you passes a shadow or landmark. Then count the seconds until you reach it.

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