California Driver License (DMV) Written Practice Test

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Question: 1 / 50

If you are driving at 55 miles an hour, what should your following distance be?

30 seconds

A general rule to determine your following distance while driving is to use the "three-second rule". To do this, pick a fixed object on the road, such as a sign or a tree. When the car in front of you passes that object, start counting "one-one-thousand, two-one-thousand, three-one-thousand". If you reach the object before you finish counting, then you are following too closely. This rule accounts for the three main factors that contribute to safe following distances reaction time, perception time, and braking time. In this case, driving at 55 miles an hour means that you should ideally be at least 165 feet behind the car in front of you. Options B, C, and D are incorrect because they do not account for all three factors or do not provide a specific distance to follow. Option B states a time period but does not give a

4 seconds

15 seconds

7 seconds