Australian road rules are broadly consistent, but the legislation belongs to each state and territory. Default speeds, mobile-device exceptions, provisional restrictions, towing and overseas-licence periods can change at a border.
Model rules and local law
The Australian Road Rules provide a national model. Jurisdictions enact and amend their own versions, so a summary cannot replace the current local authority.
Posted signs, licence conditions and lower vehicle-specific limits always take priority over a general default.
Default unsigned speed examples
Queensland and Victoria describe 50 km/h in built-up areas and 100 km/h outside built-up areas. Western Australia states 50 km/h built-up and 110 km/h on open roads.
The Northern Territory generally uses 60 km/h in built-up areas unless gazetted lower and 110 km/h outside, with signed 130 km/h sections on specified highways.
- Follow posted signs
- Check before crossing borders
- Apply vehicle limits
The other differences that matter
Mobile-device exceptions, learner and provisional conditions, towing speeds and overseas-licence conversion periods all vary. A rental company can also impose tighter road exclusions.
Save direct state authority links before travel and review them whenever the vehicle, licence status or jurisdiction changes.
Why the rules differ at all
Road law in Australia is made by each state and territory rather than nationally. The Australian Road Rules provide a model that jurisdictions adopt with variations, so the base is consistent and the details are not.
The practical consequence is that speed defaults, mobile device exceptions, towing limits, licence conditions and even some signage change as you cross a border, frequently with no reminder.
On a trip crossing several states this matters. Check the position in each jurisdiction on your route rather than carrying one state's rules across the whole country.
- Each state makes its own road law
- Borders change the rules without warning
- Check each jurisdiction on the route
The differences most likely to catch you
Default open road limits vary from 100 to 110 kilometres per hour, with specified Northern Territory sections at 130. Built-up area defaults also differ, with the Territory using 60 rather than 50.
Towing speed limits differ, with Western Australia capping towing at 100 and other states applying limits based on vehicle mass. Following distance rules behind heavy vehicles also vary.
Mobile phone rules, learner and provisional restrictions and the treatment of overseas licences all differ between states, and the penalties for getting them wrong are real.
- Open limits range 100 to 130
- Towing limits differ by state
- NT built-up default is 60
Crossing borders in practice
Quarantine checkpoints operate at several state borders, restricting fresh produce, honey, plants and soil. These are enforced with fines and, at some crossings, detector dogs.
Time zones change at some borders and not others, and several states observe daylight saving while others do not. Queensland, the Northern Territory and Western Australia do not, which creates larger gaps in summer.
Fuel prices, alcohol restrictions and even the availability of particular fuel grades change across borders. Check what applies where you are going rather than where you have been.
- Quarantine checkpoints at several borders
- Daylight saving splits the country
- Alcohol restrictions vary by region
Practical border checklist
Before each border, run through the short list: quarantine produce, time zone change, fuel top-up, alcohol restrictions ahead, and any change to speed or towing limits. It takes two minutes and prevents most border problems.
Save the relevant state road authority page for each jurisdiction on your route while you have reception. Rules change and the authority page is the only source that reflects the current position.
When in doubt, follow the stricter rule you know of. It is never an offence to drive more cautiously than the local limit permits.
- Run a border checklist each time
- Save authority pages while online
- Two minutes prevents most problems
Lugares por el camino
Comprueba antes de salir
Las normas y las condiciones cambian. Vuelve a consultar la fuente oficial y la página de tu parque o camping concreto antes de salir.
Llévalo a la carretera
Guarda las paradas. Planifica todo el viaje.
Monta una ruta ordenada con los lugares guardados, calcula la distancia y mantén fechas, notas y tareas asociadas.