If you want to rent a car, there are several car rental stores in the city but also many things you should pay attention to. The city's traffic is quite complicated, specially on rush hour: from 7:30am to 9am and from 5:30pm to 8pm. You might choose your way on map before leaving so you won´t get stuck in big avenues traffic jam. To reduce city traffic the Brazilian law fixes that some cars can not circulate in specified days, depending on its plaque. But you can relax, that law is not applied on rented cars.