The roads in Melbourne's city center are quite narrow, and there are various unique traffic signs and trams. Plus, you have to drive on the opposite side of the road, which is a nightmare for beginners. However, experienced drivers can adapt in a day. Picking up and returning the car is very convenient, but be careful not to return it too late, as they leave promptly when their shift ends. Many rental cars are diesel, so make sure to use the correct fuel, or the consequences can be severe. The Great Ocean Road is extremely beautiful, a perfect route for self-driving.