Space Cushion and Following Distance

Key points

1. A safe following distance is 2 to 4 seconds; above 30 mph it should be 4 seconds or more.

   Source: Handbook p. 26

   “A safe following distance is defined as 2-4 seconds. For speeds greater than 30 mph, a safe following distance should be 4 seconds or more”
   Oregon Driver Manual, Handbook p. 26

2. Count from when the car ahead passes a fixed mark; you are too close if you reach it in under 2 seconds.

   Source: Handbook p. 27

   “You are following too closely if you pass the mark before you finish counting at least two seconds.”
   Oregon Driver Manual, Handbook p. 27

3. When stopped behind a vehicle, you should see where its rear tires meet the road.

   Source: Handbook p. 27

   “When stopping behind another vehicle, make sure you can see where the rear tires of the vehicle in front meet the road.”
   Oregon Driver Manual, Handbook p. 27

4. Increase your following distance on wet or slippery roads, because you need more distance to stop.

   Source: Handbook p. 27

   “On wet or slippery roads. You need more distance to stop your vehicle.”
   Oregon Driver Manual, Handbook p. 27

5. Never brake hard to discourage a tailgater; you could get hit from behind.

   Source: Handbook p. 29

   “Never brake hard to discourage tailgating; you could get hit from behind.”
   Oregon Driver Manual, Handbook p. 29

6. At 60 mph, your total stopping distance is longer than a football field.

   Source: Handbook p. 29

   “At 60 mph, the distance traveled from the point you recognize a hazard ahead and apply the brakes, to where your vehicle comes to a stop is greater than the length of a football field.”
   Oregon Driver Manual, Handbook p. 29

7. Before changing lanes, glance over the shoulder on the side you are moving toward.

   Source: Handbook p. 30

   “Glance over your left shoulder if you are moving left. Glance over your right shoulder if you are moving right”
   Oregon Driver Manual, Handbook p. 30

Numbers to know

3 questions from the Oregon practice test

1. 1. What following distance does the Oregon manual define as safe in ordinary conditions?

   1. One second at every speed
   2. Exactly one car length
   3. Two to four seconds
   4. Ten seconds only on freeways
   Show answer

   Two to four seconds. The manual defines a safe following distance as two to four seconds in ordinary driving. When traveling faster than 30 mph, it advises four seconds or more, because higher speed leaves less time to notice a hazard and increases stopping distance. One car length is not a dependable measure because the needed space changes with speed. Ten seconds is not the standard baseline. Pick a fixed object, wait for the vehicle ahead to pass it, and count until your own vehicle reaches that point.

2. 2. What response does Oregon recommend when visibility is reduced or the road is wet, snowy, or icy?

   1. Follow the vehicle ahead more closely to see its path
   2. Keep the posted speed and shorten the following gap
   3. Use cruise control to maintain a steady pace
   4. Use slower speeds and increase the following distance
   Show answer

   Use slower speeds and increase the following distance. Hazardous conditions call for slower travel and more space behind the vehicle ahead because visibility and traction can deteriorate while braking distance grows. Keeping the posted speed may violate the basic rule when conditions make it unsafe. Cruise control is especially inappropriate on wet or snow-covered roads, and a close following gap leaves no recovery time if the lead vehicle stops. Reduce speed smoothly, keep windows clear, and preserve a cushion that allows gentle braking and steering.

3. 3. A driver is tailgating you, and there is no right lane you can move into. What does Oregon say about braking hard to discourage them?

   1. Never do it, because you could be hit from behind
   2. Do it once, then return to your normal speed
   3. Do it only after signaling with your turn signal
   4. Do it only when the tailgater is very close
   Show answer

   Never do it, because you could be hit from behind. Oregon tells drivers never to brake hard to discourage tailgating, because you could get hit from behind. If a vehicle behind you is following too closely and there is a right lane, move over to the right. If you cannot move over, slowly reduce your speed, which may encourage the other driver to pass or to stop tailgating. Keeping a steady speed and gently pressing the brake early to signal a stop also helps. A single hard stop, with or without a signal first, still risks a rear end collision.

Source: the Oregon Driver Manual, Lane Travel: Maintaining a Space Cushion. This lesson is a plain English summary, not the law itself; where it differs, the manual and the statute govern. Last checked 2026-09-27.