When you drive in Australia, you usually drive on the left side of the street. Now, the steering wheel is actually on their right side. And, almost seventy percent of cars in Australia are automatic transmission. Now, when you will hire a car, the manual transmission will only be offered as a choice when it comes to the cheapest and most affordable cars.
Drivers in Australia require a valid driving licence. Foreign licences in English are considered valid for driving in Australia for visitors for three months. If your licence is not in English, an International Driving Permit which is issued in your home country before arrival in Australia is required.
All measurements in Australia are metric. Distances are in metres and kilometres, and speed in kilometres per hour.
Australians drive on the left side of the road and the majority of vehicles have the steering wheel on their right side. Around 70% of Australian cars are automatic transmission. When hiring a car, manual transmission (stick-shift) is generally only offered as an option for the cheapest small cars. The gear stick in a manual transmission is operated by the left hand. The arrangement of the pedals is standard worldwide. In most cars, the indicator (turn-signal) stalk will be on the right side of the steering wheel and the windscreen wiper stalk on the left side of the steering wheel.
Driving conditions vary. Most Australians live on or near the eastern and south-east coasts. Roads within and between the cities and towns in these areas are sealed (paved) and well maintained, as are the main highways that join the state and territory capital cities. There are usually plenty of well marked rest areas on major highways, though these are usually very basic and do not always have toilet facilities.
In more remote areas (known as the “Outback”) motorists may travel for hundreds of kilometres between towns or road houses without opportunities to refuel, get water, refreshments, or use toilets. In these areas, even on major highways, you will have to plan your trip, including fuel and food stops. Off the major inter-city highways, road conditions can be difficult in remote areas. Many roads are unsealed (gravel or sandy) and often poorly maintained. Some may only be suitable for four-wheel drives and some (including major sealed highways) may not be passable at all in certain seasons or weather conditions.
Motorists need to be self-sufficient and prepared for emergencies when travelling off major highways in remote areas and be aware that outside of major towns, mobile (cell) phone coverage will almost certainly be non-existent. A satellite phone may be a worthwhile and possibly life-saving investment in the most remote, lightly trafficked areas. Permits may also be required to travel through Aboriginal communities in certain remote locations, though these permits can usually be obtained for free.
Source of above information: https://wikitravel.org/en/Driving_in_Australia