High-Capacity Performance Today
US-101 is used primarily by single occupancy vehicles today. Only 13-22% of peak hour vehicles on US-101 have two or more passengers. Ridership and availability of public transit buses on the corridor varies widely. Using ridership figures from early 2020, SF Muni carries about 40,000 boardings per weekday on its four routes that use US-101 in San Francisco. SamTrans serves about 1,400 daily boardings on its two routes that use US-101 and VTA serves about 500 daily boardings on four routes. Caltrain and BART, which provide alternatives to driving on portions of US-101, carry a higher number of transit riders during peak travel periods. Although ridership data from employer shuttles is not always publically available, more than 200 shuttles use US-101 each day. As ride-hailing apps such as Uber and Lyft have increased in use, especially for airport trips, surface congestion in and around airports has increased and transit ridership has decreased.