M3 line

The M3 line is a metro or subway route that is part of a city's transit system, often referring to the Madrid Metro's Line 3 in Spain. It connects various neighborhoods, facilitating quick and efficient travel across the city. The line features underground and above-ground sections, with stations where passengers can board or disembark. Its purpose is to help people move smoothly within the city, reducing traffic congestion and providing an accessible, reliable transportation option for daily commuters and visitors alike.