Madrid is served by highly developed transport infrastructure. Road, rail and air links are vital to maintain the economic position of Madrid as a leading centre of employment, enterprise, trade and tourism, providing effective connections with not only other parts of the region, but also the rest of Spain and Europe as a whole. Three quarters of a million people commute into the city to work, and these and other local travellers have available a high-capacity metropolitan road network and a well-used public transport system based on the Metro, the Cercanías local railways, and a dense network of bus routes.

The M-30 orbital motorway circles the central districts of Madrid, the capital city of Spain. It is the innermost ring road of the Spanish city, with a length of 32.5 km. Outer rings are named M-40, M-45 and M-50. Its length and the surface surrounded by the M-30 is comparable to the Boulevard Périphérique of Paris, the Grande Raccordo Anulare of Rome or the London Inner Ring Road.