Towing Rules in Australia: What You Should Know Before Hitting the Road

Towing a caravan opens the door to unforgettable journeys – but it also comes with responsibilities. Across Australia, towing rules differ slightly between states and territories, which can leave travellers confused about what’s mandatory and what’s simply good practice. At Adelaide RV, we like to follow Dave’s approach: even if something isn’t technically required everywhere, it’s worth doing if it keeps you safer on the road.

This guide breaks down the most important towing rules, the smart habits every traveller should adopt, and how to keep your caravan compliant no matter where you roam.

Towing Rules and Trailer Build Requirements

If you’re buying an Australian-made caravan from a reputable manufacturer like Supreme, Leader, or Goldstream RV, the build will already comply with national vehicle standards. These federal regulations cover essentials such as:

• Maximum reflector and tail-light height

• Number plate placement

• Minimum reflector height from ground level

• Rear lighting visibility angles

• ADR compliance for braking and stability systems

Dave’s team still checks every van – especially second-hand stock – using measurement tools to confirm indicator and plate heights. If something looks “off” on a van you’re inspecting, it might be a sign the builder has stretched the rules.

Breakaway Systems: A Key Safety Requirement

Under Australian towing rules, any trailer with an ATM (Aggregate Trailer Mass) over 2,000 kg must be fitted with a breakaway braking system. This system must apply the caravan’s brakes automatically if the van becomes detached from the tow vehicle.

Key requirements across Australia:

• Breakaway brakes are mandatory for all caravans over 2 tonnes (ATM).

• The breakaway battery must hold the brakes for at least 15 minutes (required in NSW, recommended everywhere).

• Do not store the breakaway pin loose – removing it makes the system live and unsafe.

Regardless of where you travel, always ensure your breakaway cord, pin and battery are in good working order before towing.

Towing Mirrors: Required Nationwide

This is one of the most commonly misunderstood towing rules.

Across every Australian state and territory, you must have towing mirrors if your caravan is wider than your vehicle (which is almost always the case). You need to be able to see:

• The full side wall of the caravan

• At least 20 metres behind the van

• Both sides of the traffic lane

Fines in NSW, Victoria, and Queensland can exceed $300–$500, plus demerits – far more than the price of a good set of mirrors. Dave’s tip stands: put them on when towing, and take them off when not towing to avoid breakages or getting fined for having them fitted unnecessarily. Read our article here on how to fit and use them properly.

Safety Chains: The State-by-State Towing Rules

Here’s where the towing rules vary the most across Australia.

When Using One Safety Chain (Up to 2.5T trailers)

• A single chain must be fitted and rated.

• Queensland and NSW strongly recommend crossing it diagonally if possible.

When Using Two Safety Chains (Common on Caravans Over 2.5T)

New South Wales:

• Chains must be crossed.

• Must prevent the drawbar from hitting the ground.

Victoria:

• Crossing chains is recommended for safety, but not explicitly legislated.

South Australia:

• Either straight or crossed chains are allowed, as long as the chains are rated and correctly secured.

Queensland & NT:

• Crossing is recommended but not mandated.

Best practice: Cross your chains every time. You can’t get fined for crossing your chains – but you can get fined in some states for not doing it.

Rated Shackles: What’s Legal?

Rated safety shackles are required by law in NSW and strongly recommended elsewhere. The general national standard is:

• Must be load-rated

• Must be appropriately sized for the tow bar point

• The biggest shackle that fits safely is best practice

Some states suggest installing shackles with the pin facing downwards, though tow bar designs vary. Dave recommends carrying your own set and storing them securely when unhitched to prevent theft.

Lights, Reflectors, and Pre-Drive Checks

No matter what state you’re in, it’s your legal responsibility to ensure:

• All indicators work

• Brake lights activate

• Tail lights are functional

• The number plate is illuminated

• Side reflectors are fitted and visible

Dave’s tip is a simple one: always do a light check before pulling out of the driveway, park, or site. It saves roadside chaos and keeps you compliant.

Water Tanks and Weight Interpretation Across Australia

Weights are another area where travellers get caught out. Dave mentions something many people don’t realise – Some states assume your water tanks are full when checking weights.

For example:

• NSW and QLD inspectors often assess GVM/GCM/ATM as if water tanks are full, even if they’re empty at the time.

• South Australia tends to be more flexible, but rules still allow inspectors to require tanks to be filled.

So you can’t simply dump water to “get underweight”. Always tow as though your tanks are full — it keeps you safe and avoids unexpected roadside problems.

Living Full-Time in Your Caravan: Insurance and Warranty Rules

If you plan to live in your caravan full time:

• Tell your insurer. Some policies require disclosure or won’t cover full-time occupants.

• Check your manufacturer’s warranty.

  • Supreme & Leader: full-time living is allowed.

  • Some other brands: warranty may be void if you live in the van permanently.

This is one of the lesser-known towing rules because it affects your legal protection rather than the act of towing itself.

Final Thoughts: Safety First, Adventure Always

Australia’s towing rules are designed to keep drivers, families, and caravans safe on the road. While each state has its quirks – especially around chains, shackles, and weight assessments – following the strictest interpretation is always the easiest and safest approach.

As Dave says, erring on the side of caution means smoother travel, fewer hold-ups, and a more relaxed holiday. Whether you’re crossing borders or cruising through South Australia, these simple habits make the journey safer for everyone.

If you’d like help checking your caravan setup, our team at Adelaide RV is always here to support your travels.