In Canberra, city streets and residential streets have a speed limit of 31 mph, posted as 50 km/h. More major roads in the city, however, have a speed limit of 37 mph, posted as 60 km/h. School zones have a speed limit of 25 mph, posted as 40 km/h. For those driving car rentals in Canberra, remember that the speed is posted in kilometers, so it is higher than it would be in mph. So, when you see a posted speed such as 50, your instinct might be to drive 50 mph, which would result in your speeding egregiously. Search rental cars on KAYAK