12/09/2024
How Close Is Too Close?
The Three-Second Rule
The Three-Second Rule says that your following dis
tance should be at least three seconds travel time
behind the vehicle in front of you. Measure your follow
ing distance this way: Choose a landmark such as a tele
phone pole or tree that the vehicle in front of you has
not yet passed. When the vehicle’s rear bumper passes
that landmark, start counting seconds: “One thousand
and one, one thousand and two, one thousand and
three.” If your front bumper reaches the landmark
before you finish counting, you are following too closely.
For safe driving, you need to keep a safe distance
between you and the car in front of you. If you are too
close, you will have trouble scanning the road ahead.
With enough following distance, you can see 15 to 30 sec
onds down the road, and be able to plan and make deci
sions for safe driving. Also. a safe following distance
increases the chances that if the car ahead of you stops
suddenly, you can stop in time to avoid a collision. But
how far is that? Your safe following distance depends on
how fast you are going and what the road conditions are.
The threesecond rule is a convenient way to figure your
safe following distance at various speeds without having
to do calculations with numbers.