What Is the Following Distance Rule in Ontario?

The standard following distance in Ontario is a minimum of 2 seconds. To measure it: watch the vehicle ahead pass a fixed point (such as a sign or overpass), then count 'one-one-thousand, two-one-thousand.' Your vehicle should not reach that fixed point until you finish counting. If it does, you are following too closely.

Two seconds is the minimum for ideal conditions. As road conditions deteriorate, you need significantly more space.

When following a large vehicle such as a truck or bus, increase your following distance further so you can see around it and so the driver can see you in their mirrors. If you cannot see their side mirrors, they cannot see you. Also allow more space when following motorcycles, as they can stop faster than larger vehicles.

Maintaining a following distance is part of a broader concept called the space cushion: keeping safe space on all sides of your vehicle, not just the front. Check your mirrors regularly to be aware of who is behind you. If someone is tailgating you, gradually ease off the gas to increase your front buffer so you do not have to brake suddenly.

Road test examiners look closely at following distance. Following too closely is considered a serious error and can result in an automatic test failure. Practice the 2-second count on every drive so it becomes habit. In heavier traffic, it may feel uncomfortable to leave space because other vehicles will cut in, but continue to rebuild your buffer.