The Transit Effectiveness Project (TEP), which aims to improve service reliability, reduce travel time on transit, and improve customer experiences and service efficiency, has identified Muni’s 28 19th Avenue Corridor as being a part of its proposed Rapid Network. The 28 19th Avenue and 28L 19th Avenue Limited bus routes together carry about 17,500 daily customers on an average weekday. The route’s study corridor is 3.4 miles of 19th Avenue between Lincoln Way and Junipero Serra Boulevard. The M Ocean View Line also travels through a portion of the study area. Within the study area, the 28 19th Avenue local service operates at an average speed of 9.9 miles per hour during peak periods. In order to reduce transit travel times and improve reliability within its proposed Rapid Network, the SFMTA proposes a toolkit of measures within the study area.
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To reduce travel times and enhance reliability on the routes that make up its proposed Rapid Network, the Transit Effectiveness Project (TEP) identifies a variety of Travel Time Reduction Proposals (TTRPs), which are engineering strategies oriented to specifically address the delays vehicles face along rapid routes. As a part of the TEP's proposed Rapid Network, the 28-19th Avenue has its own toolkit of TTRPs, which specifically target the evaluated causes of delays within the 28-19th Avenue corridor.
overview of ttrps
The proposals include:
- Increasing bus stop spacing from one block to two blocks. Currently, the 28 19th Avenue local service stops at every block between Lincoln Way and Eucalyptus Drive. This proposal moves toward a two-block spacing for most stops. By stopping fewer times, the bus would take less time to move through the corridor. Reducing number of limited service stops. Currently, the 28L 19th Avenue Limited has seven stops in each direction within the study area. This proposal would provide stops at major transfer points and destinations, including Judah Street, Taraval Street, Winston Drive and Holloway Avenue.
- Optimizing bus stop locations at five intersections. Relocating bus stops from the near-side to the far-side of intersections allows buses to take advantage of planned transit signal priority improvements that will allow traffic signals to be programmed to hold green lights for approaching buses.
- Adding transit bulbs at 14 intersections. Transit bulbs are sidewalk extensions alongside bus stops that allow buses to pick-up and drop-off customers without having to pull out of the travel lane into a bus stop and then wait for a gap to merge back into traffic. Transit bulbs enhance the ability of buses to take advantage of planned all-door boarding. Transit bulbs provide space for transit shelters and other customer amenities. Transit bulbs also improve pedestrian safety by reducing the roadway crossing distance, making pedestrians waiting to cross the street more visible to approaching motorists, and reducing the speed of motorists turning from cross streets.
- Adding pedestrian bulbs at 11 intersections. Pedestrian bulbs are sidewalk extensions at intersection corners that improve pedestrian safety by reducing the roadway crossing distance, making pedestrians waiting to cross the street more visible to approaching motorists, and reducing the speed of motorists turning from cross streets. Reducing pedestrian crossing distances can provide flexibility in traffic signal timing that can reduce Muni delays.
- Shortening one left-turn lane on northbound 19th Avenue at Winston Drive. Shortening the left-turn lane that is currently shared with inbound M Ocean View trains would reduce delays for trains which currently must wait for the left turn queue to dissipate before proceeding through the intersection. By shortening the left-turn lane that is shared with the M Ocean View, the space for non-transit vehicles to queue in front of trains would be reduced, thereby allowing both the non-transit vehicles and trains to clear the intersection in one left-turn signal phase.
Together, the proposed changes are anticipated to reduce the travel time of the 28 19th Avenue local service by more than 5 minutes in each direction (11 minutes total) within the study area (25 percent reduction), improving the average operating speed to 12.2 miles per hour and improving service reliability. The proposed changes are anticipated to reduce the travel time of the 28L 19th Avenue Limited by 1.5 minutes in each direction (3 minutes total) within the study area (nine percent reduction), improving the average operating speed to 12.7 miles per hour. Transit signal priority improvements are anticipated to save an additional 40 seconds in each direction for the 28 19th Avenue local service and 1.5 minutes each direction for the 28L 19th Avenue Limited. Other changes such as operational improvements and network enhancements would further improve travel times along the corridor and add valuable customer amenities such as NextBus displays. The travel time savings would also reduce operating costs on the line and allow for service to be cost effectively increased.
San Francisco’s Pedestrian Safety Task Force, created through Executive Directive 10-03: Pedestrian Safety In San Francisco, identified several high injury density corridors that encompass less than seven percent of City streets but account for over half of serious and fatal pedestrian injuries, including 19th Avenue. The transit bulbs and pedestrian bulbs recommended as part of this travel time reduction proposal can improve pedestrian safety and could be further enhanced with additional pedestrian safety treatments.
28 19th Avenue (Lincoln Way and Junipero Serra Boulevard) and 28L 19th Avenue Limited and M Ocean View
Muni’s 28 19th Avenue and 28L 19th Avenue Limited bus routes together carry about 17,500 daily customers on an average weekday. The route’s study corridor is 3.4 miles of 19th Avenue between Lincoln Way and Junipero Serra Boulevard. The M Ocean View Line also travels through a portion of the study area.
Within the study corridor, 28 19th Avenue and 28L 19th Avenue Limited together serve over 8,500 customers on an average weekday and the M Ocean View Line serves an additional 5,400 customers at the stops located along 19th Avenue at Holloway Avenue and Winston Drive.
Within the study area, the 28 19th Avenue local service operates at an average speed of 9.9 miles per hour during peak periods. The main sources of delay are closely spaced bus stops and traffic congestion.
The TEP also proposes service adjustments for the 28-19th Avenue. These are proposals for route restructuring, frequency improvements, and vehicle type changes, which will direct resources where they are needed most, reducing crowding and improving connections to regional transit.
TTRPs for Connecting Rapid Network Routes: