Following distance — Oregon Permit Test

A safe following distance is 2 to 4 seconds, and at speeds greater than 30 mph it should be 4 seconds or more.

Seconds rather than car lengths, because the gap you need grows with speed and a fixed number of lengths does not.

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 to allow you time to make a decision and take action.

You are following too closely if you reach a fixed mark the vehicle ahead has passed before you finish counting at least two seconds.

It turns a judgment into a count, which is the only way to check a gap you have already got used to.

You are following too closely if you pass the mark before you finish counting at least two seconds.

When stopping behind another vehicle, leave enough room to see where the rear tires of the vehicle in front meet the road.

That much space lets you pull around if the vehicle ahead stalls, and absorbs the roll-back when it starts on a hill.

When stopping behind another vehicle, make sure you can see where the rear tires of the vehicle in front meet the road.

Increase your following distance on wet or slippery roads, behind bicycles or motorcycles, behind drivers who cannot see you, when carrying a heavy load or trailer, when visibility is poor, when stopped on a hill, while learning to drive, and in a work zone.

Each of these either lengthens your stopping distance or shortens the warning you get, and the gap is the only thing you control that covers both.

The drivers of large vehicles may not be able to see you when you are directly behind them. These vehicles also block your view of the road ahead.

If a vehicle behind you is following too closely and there is a right lane, move over; if you cannot, slowly reduce your speed, and never brake hard to discourage tailgating.

Braking at a tailgater invites the collision you are trying to avoid, and puts the fault for it on you.

Never brake hard to discourage tailgating; you could get hit from behind.

What following distance does Oregon call safe at speeds greater than 30 mph?

4 seconds or more. Seconds rather than car lengths, because the gap you need grows with speed and a fixed number of lengths does not. 2026-2027 Oregon Driver Manual, 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 to allow you time to make a decision and take action.”