The connection between downtown Porto Alegre and the highways is made by Avenida Presidente Castelo Branco (President Castelo Branco Avenue), which is a short - 4 kilometers - avenue also bordering the northwest side of the city, Avenida dos Estados (States' Avenue), which is the access way to the Salgado Filho International Airport, and Avenida Assis Brasil (Assis Brasil Avenue), the main Avenue in the northern Porto Alegre.