Interstate road trips in Australia – what you need to know

There’s something special about an interstate Aussie road trip. The moment a state border sign appears the journey feels bigger and even though you may be in the same country you can expect different landscapes, different accents and sometimes different time zones. Whether you’re heading from Sydney to Brisbane along the coast, from Melbourne to Adelaide by the Great Ocean Road, or going truly wild with a Sydney to Perth Nullarbor crossing, interstate trips deliver some of our best travel memories.

They also come with a layer of planning that’s easy to underestimate. Australia’s states and territories each run their own rules on insurance, tolls, road rules and biosecurity so that what works seamlessly in one state can catch us out in the next. Here are the things to know before pointing the car at a state border.

Know your route and build in buffer time

Before anything else, we need to actually pick the route. Some interstate drives have multiple options. For example if you’re heading from Sydney to Brisbane you can head up the Pacific Motorway for speed, or via the beautiful New England Highway for scenery, history, and country towns worth lingering in. Melbourne to Adelaide can be the direct Western Highway or the long, stunning coastal route via the Great Ocean Road. Brisbane to Cairns is essentially one glorious Bruce Highway stretch, but the side trips are what make it memorable.

For anyone weighing up route options, our guide to seven great Australian road trips breaks down some of the country’s most-loved drives so you can match the route to the kind of trip you want – coastal and relaxed, outback and remote, or somewhere in between.

Whichever path we pick, building in buffer time matters. Aussie distances look deceptive on a map. A three-hour drive on paper easily becomes five with stops, fuel, roadworks, and the inevitable detour for a view we weren’t expecting. Plan generously and the trip stays enjoyable instead of stressful.

Understand how registration and CTP work in each state

This is the one most travellers don’t think about until they hit trouble. Every Australian state and territory runs its own vehicle registration and compulsory third-party (CTP) insurance system, and the terminology shifts depending on where we are.

• NSW: CTP is called a “Green Slip” and is purchased separately before rego is paid to Service NSW. NRMA Insurance provides CTP Green Slips alongside several other providers, and in NSW, the product reaches Service NSW within the hour once purchased online.
• Victoria: CTP (the Transport Accident Charge) is bundled into the rego payment. No separate insurer selection.
• Queensland: CTP is selected at rego renewal from one of the approved insurers and paid as part of the total.
• ACT: Motor Accident Injury (MAI) Insurance, included in the rego total.
• SA: CTP selected at rego renewal and paid as part of the total rego fee.
• WA, NT, Tasmania: Compulsory injury insurance is bundled into rego, varying slightly in structure.

So what does all of this mean for your road trip? The good news is no extra interstate policy is required. Wherever your vehicle is registered is where you pay CTP, so a NSW-registered car still travels on its NSW Green Slip across the country, and that cover applies nationally for injury claims on Australian roads.

Read: 14 Road Trip Hacks for your next getaway

That said, it’s always worth checking your rego expiry before a big trip. Driving with expired registration means driving without coverage, and fines apply nationwide. And if your rego is due within the travel window, it’s best to sort the renewal before departure rather than trying to do it on the road.

Check comprehensive cover before leaving home

CTP only covers injuries to other people. For damage to the vehicle itself – hail, stone chips, kangaroo strikes, tree branches, a prang in a country town – that’s a comprehensive policy (or third party property) situation.

Before heading off:

1. Confirm the policy is active and the excess is a figure you can cover in an emergency
2. Check the policy covers the full geographic scope of the trip (most do, but confirm)
3. Save your insurer’s claims phone number somewhere accessible offline
4. Note any restrictions – some policies have conditions around unsealed roads, commercial use, or specific state exclusions

Kangaroo and wildlife strikes are the most common non-collision claims on Australian highways, particularly at dawn and dusk. Peace of mind on this one is worth the premium.

Factor in tolls, fuel and biosecurity

Aussie tolls are another cross-border quirk. NSW uses Linkt and E-way, Victoria uses Linkt (mostly) and EastLink, Queensland uses Linkt again under the Transurban banner. An existing NSW e-tag usually works across most east coast tolls, but it’s worth confirming before a trip rather than finding out via a fine notice six weeks later. Tolls that aren’t covered by a compatible tag need to be paid online within three to five days of travel.

Fuel planning depends on the route. Coastal drives are pretty straightforward with lots of stations along the way but inland and outback legs need more thought. The Nullarbor, for example, has some 200km-plus stretches between stations, and running out of fuel in remote Australia is genuinely dangerous. Fill up whenever the tank drops below half on remote stretches, carry extra water, and tell someone your route if you’re going off-grid.

Read: The simple trick to know which side of the car the fuel door is on

Biosecurity also catches travellers out. Fresh fruit, vegetables, and honey often can’t cross certain state or zone borders, with South Australia and Tasmania being particularly strict. Fruit fly exclusion zones within states also apply. Be sure to check the interstate quarantine rules for your route before loading the esky, and bin anything that shouldn’t cross before the inspection point. Fines for non-declaration are significant.

Know the road rules shift between states

Road rules in Australia look broadly similar across borders but shift in the details. A few things to double-check before a long drive:

1. Speed limits: Default urban and rural speeds vary between states, and the NT has some open-road sections with higher limits than anywhere else.
2. Learner and P-plate rules: These shift state-by-state. If a less experienced driver is in the group, check whether their licence conditions change when driving interstate.
3. Mobile phone and screen rules: All states ban phone use while driving, but specifics around GPS mounts and touch-to-answer vary.
4. School zones: Signage and timing differ slightly across states.
5. Drink driving limits: 0.05 is standard across Australia, but zero limits apply for certain licence categories everywhere.

None of this is catastrophic if we get it slightly wrong, but a state-border speeding fine is an avoidable souvenir so it’s worth a five-minute check of each state’s driver handbook before you hit the road.

Plan your accommodation ahead of time on peak routes

Some Aussie interstate routes get genuinely busy during school holidays and long weekends – Sydney to the Gold Coast, Melbourne to the Great Ocean Road, Adelaide to Wine Country. Booking accommodation ahead on these routes can be the difference between a great, relaxed stop and scrambling for whatever’s left at night.

Read: Pet friendly luxury stays in NSW

For the Sydney to Brisbane stretch in particular, there are gorgeous stays along both the coastal route and the inland New England Highway option. Our Sydney to Brisbane road trip along the New England Highway guide covers the country towns and villages that are worth planning a stay around, from Tamworth’s country music heritage to Australia’s Celtic Capital, Glen Innes in the northern tablelands.

For flexibility, many booking platforms now offer full-refund options so you can adjust plans if you fall in love with a stop and want to stay longer, or cut a leg short due to weather.

Get the car ready, properly

Nothing ruins an interstate trip faster than a breakdown on a quiet stretch. Here’s what to check before you go…

1. Tyre pressure and tread, including the spare
2. Oil, coolant, brake fluid, and windscreen washer levels
3. Brake performance and any warning lights on the dashboard
4. Headlights, brake lights, and indicators are all working
5. Wipers that actually clear the windscreen properly
6. Battery age – anything over four years is living on borrowed time

For older vehicles, or vehicles that haven’t been serviced recently, a workshop visit before a long drive is cheap insurance. Roadside assistance membership is the other non-negotiable. Whichever state you’re in, being stuck without cover on a quiet stretch in rural Australia is no fun at all.

A simple pre-trip checklist

So now you know what to do, here’s your checklist for your next interstate Australian road trip:

1. Rego current (and renewed if it expires due before the return date)
2. CTP active through your home state (Green Slip, TAC, or equivalent)
3. Comprehensive cover confirmed, claims number saved
4. Roadside assistance membership active
5. E-tag checked for the states you’re crossing
6. Fuel plan for any remote stretches
7. Accommodation booked on peak routes and dates
8. Biosecurity rules checked, esky packed accordingly
9. Car serviced or, at a minimum, inspected before departure
10. Offline maps and downloaded playlists are ready to go

Australia’s interstate drives are genuinely some of the best in the world. A little preparation means the road takes the spotlight and the admin stays in the background, which is exactly where it should be. Happy travels, and enjoy every kilometre of the adventure ahead.