 Caldas da Rainha is served by an extensive network of roads. Two motorways (autoestradas), operated by Auto-Estradas do Atlântico, serve the municipality. The A8 motorway, also known as Autoestrada do Oeste, goes south to Óbidos, Bombarral, Torres Vedras, Loures, and Lisbon, and north to Nazaré, Alcobaça, Marinha Grande, and Leiria. The A15 motorway goes west to Santarém via Rio Maior. The IP6 road is a main route (itinerário principal) connecting to Peniche, Rio Maior, Santarém, Torres Novas, Abrantes, and Castelo Branco. For much of its route, IP6 runs concurrent with various motorways, including the entire length of A15 and the portion of A8 in Óbidos. The IC1 road is a secondary route (itinerário complementar) which runs the length of the country from Valença in the north to Guia (Albufeira) in the south via Porto and Lisbon. North of Lisbon, IC1 runs concurrent with various motorways, including almost the entire length of A8.
