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Rules for heavy vehicles

There are some general road rules in Queensland affecting the use of heavy and long vehicles. These include rules for:

Heavy vehicles weigh 4.5t or more and long vehicles measure 7.5m or more.

Safe following distances

When driving a vehicle that is 7.5m or longer and following another long vehicle, you must leave a gap of at least 60m between your vehicle and the vehicle in front of you.

If you are driving a road train, you must leave a gap of at least 200m.

This rule doesn't apply if you're driving on a multi-lane road or a road in a built-up area. In these cases you must leave enough space to allow you to stop safely and avoid a crash.

You should increase these following distances in poor weather conditions.

Read more about safe following distances.

Stopping and parking rules

If you're driving a heavy or long vehicle, you can stop in built-up areas for up to 1 hour. You can only stop for longer if:

  • you're dropping off or picking up goods—for the entire period your vehicle is stopped
  • signs say otherwise.

You may only stop on the shoulder of roads in non-built-up areas.

You can contact your local council if you have a stopping or parking issue relating to a heavy vehicle.

Example black text on white sign: Bridge load limit (per axle group) Single axle, Tandem axle, Tri-axle

Load limits

You must not drive past a bridge load limit sign, or a gross mass limit sign, if the maximum gross mass of your vehicle is above the limit shown on the sign.

Using low gears

Example black text on white sign: Trucks & buses must use low gear

When driving a truck or bus on steep routes (such as Cunningham's Gap, the Kuranda Range or the Toowoomba Range) you must drive in a gear low enough to limit your speed without relying on your primary brake.

This rule is designed to reduce brake fade and the potential of serious accidents.


Find out about fines and enforcement, including information on demerit points and how to pay infringements.

Last updated
8 June 2016
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