Rio has a very efficient transportation system. Taxis are the safest method of getting around the city. The metro (subway) is very useful if your hotel is located near the metro stations. Driving a car by yourself can be pretty frustrating because traffic laws are not strictly enforced in the city. Cars are driven on the right side of the road. The speed limit on the highway is 50mph (80kph). Exits off the highway are called "saidas". Renting a car and driving it outside the city may be a good option. You can travel in air-conditioned comfort on the executivo buses. Buses are the main means of transportation into and out of the city.