and on October 15, the shuttle service was replaced with larger streetcars running through to the Ferry Building. The URR discontinued their service on the line in late 1927. The L Taraval was extended south (turning off Taraval at 46th) to the San Francisco Zoo, the line's current outer terminus, on September 15, 1937, leaving a two-block spur line on Taraval, that is used occasionally for temporary storage. Over the next decade, the line's eastern terminus changed a few times. On January 15, 1939, every other streetcar was routed to the new Transbay Terminal. On January 1, 1941, cars were rerouted back to the Ferry Building. The Transbay Terminal became the inner terminal for all streetcars on June 6, 1948. By 1950, many streetcar lines in the city were converted to buses after World War II, the L Taraval remained a streetcar line due to its use of the Twin Peaks Tunnel. The L was partially converted to modern light rail operation as part of the opening of the Muni Metro system in 1980. L Taraval Improvement Project For its first 100 years in operation, the L Taraval operated similar to a bus, with rail vehicles receiving no priority over any other vehicle, obeying all stop signs, and stopping frequently when requested or when flagged down by passengers waiting at marked stops on the sidewalk. Because the rails were laid in the center of a four-lane roadway, passengers boarding or exiting must cross an active traffic lane. Often drivers would not stop for crossing passengers, leading to many being hit and injured getting off and on the L Taraval over the decades. Starting in the early 2010s, Muni began proposing major changes to the L Taraval corridor to increase pedestrian safety and speed up trains, which would prove to be controversial. The plan, eventually named the L Taraval Improvement Project, would dedicate the center lanes to rail vehicles, consolidate stops, and where stops remain, add traffic islands between the transit-only lane and the general traffic lane, giving passengers a protected area to exit or wait for the L Taraval. The project would also replace many of the stop signs along the route with traffic signals with transit priority, add additional traffic calming measures like curb extensions, replace the worn rails and overhead wire, along with sewer and water line replacements. The plan was controversial because adding traffic islands would require