The speed limit in most residential areas is 60kms per hour and on the open highways it is generally 100kms per hour. Speed cameras operate at random locations throughout Queensland. There is a 0.05 blood alcohol limit in Queensland and it is generally considered that two standard drinks could put you over the limit. Roadside random breath testing units are common, particularly around the larger cities and towns. If you come to an intersection with no 'Give Way' or 'Stop' signs, you must give way to vehicles on your right. When approaching vehicles at a roundabout, you must give way to vehicles on the right even if they are not yet at the roundabout. During the year, Cane Trains can be seen throughout North Queensland. They travel on their own train lines hauling sugar cane to various mills. When they cross main roads, there are usually signals. On the back roads, there are only 'Give Way' signs. Be careful. Cane trucks are common on the roads, particularly from June to December. The coastal road between Cairns and Port Douglas, although a gorgeous drive, can be a bit hairy as there are some very sharp bends. Total concentration is required by the driver and overtaking lanes should be observed. There are plenty of places to pull over and admire the view, along the way. There are no traffic lights in Port Douglas. You can use a foreign driving licence in Australia, as long as it is in English (if it's not, a translation must be carried.) Residents of Queensland can obtain their driver's licence from the age of 17. It's a good idea to pay attention to parking restrictions or you could find yourself slapped with a parking ticket, particularly in Cairns. Remember, most roads north of Cooktown are unpassable during the wet season (November - March).