Adhering to the speed limit posted on signs is pivotal; also, bear in mind that limits are given in kilometers per hour. General regulations allow up to 60 km/h (37 mph) in the city and 90 km/h (56 mph) on state roads. Freeways generally allow up to 110 km/h (68 mph), but if there is rain, strong wind, or the area is mountainous, it may be reduced to 80 or 90 km/h (50-56 mph). Search rental cars on KAYAK