The Santiago Metro, known as "Metro de Santiago", began operations on September 15, 1975, is the public transportation system of Santiago, the capital of Chile. It currently consists of seven lines (numbered 1–6 and 4A), 143 stations and 149 kilometers (92.6 mi) of revenue routes. The system is managed by state-owned Metro SA and is the first and only rapid transit system in the country. As one of the largest and busiest metro systems in Latin America, it plays a vital role in reducing traffic congestion, providing a reliable mode of transportation for millions of residents, and contributing to the overall connectivity and development of Santiago. . The metro system continues to expand and grow, with ongoing projects aimed at meeting the growing demand for public transportation in this dynamic and bustling metropolis.