US-101 San Francisco Urban Segment

The US-101 San Francisco Urban Segment is an arterial freeway located in San Francisco, California. It extends from the southern terminus at the interchange with I-280 near the city's South of Market (SoMa) neighborhood, traversing northward through the downtown area. The corridor continues to the northern end at the Golden Gate Bridge approach, facilitating access to Marin County and beyond.

This corridor plays a crucial role in the regional and national transportation network by accommodating significant commuter travel and freight movement. It connects various neighborhoods and key areas within San Francisco, serving as a vital link for residents commuting to employment centers, including the financial district and various tech companies in the region. The populations in and around San Francisco, which total over 880,000, rely heavily on this corridor for daily transportation needs.

The US-101 San Francisco Urban Segment also provides access to several notable destinations. It is in proximity to the waterfront, is close to the San Francisco Bay, and directly connects to renowned sites such as Fisherman’s Wharf, Alcatraz Island, and the Golden Gate National Park. The corridor is characterized by varying congestion levels, particularly during peak commuter hours, and is subject to seasonal travel demands due to tourism.

Ongoing infrastructure upgrades and transportation planning initiatives aim to improve traffic flow and safety along this segment, addressing congestion issues and enhancing regional connectivity. This corridor not only serves local travel but also plays a vital role in facilitating tourism to one of the most visited cities in the United States.