The M-30 is a major ring road that encircles the city of Madrid, Spain. It serves as a vital transportation route, facilitating the movement of vehicles around the city and connecting various neighborhoods and suburbs. The road is approximately 32 kilometers long and is designed to alleviate traffic congestion in the urban center. Constructed in the late 20th century, the M-30 features multiple lanes in each direction and includes several tunnels to minimize surface traffic. It plays a crucial role in the city's infrastructure, helping to improve accessibility and reduce travel times for commuters and visitors alike.