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L Taraval Improvement Project

Project Introduction
Segment B Work Has Begun! 

The L Taraval Improvement Project continues infrastructure work along the L Taraval line from Sunset Blvd. to 15th Ave., and on Ulloa St. near West Portal.
Potholing and sewer related preparation work is underway at specific locations and includes excavation, sewer trench work, saw cutting of the concrete and pavement with water, installation and waterline work.  Temporary small scale staging areas are being set up near specific work sites.

More information is available within the project update.


In response to numerous collisions and reported safety concerns, an early implementation of measures known as the L Taraval Rapid project improved safety by adding temporary clear zones at transit stops, a transit only lane and painted safety zones at street corners. The next step is a nearly complete rehabilitation on Taraval Street that will replace infrastructure like the worn rails, overhead wires, water and sewer lines, as well as repave the entire street.

Construction has begun for the L Taraval Improvement Project and it will last approximately three years. Transit service on the L Taraval will remain throughout with a combination of buses and trains. Once completed, the corridor will boast new transit priority traffic signals, bulbouts to make pedestrian crossing safer, new trees, high visibility crosswalks, safety boarding islands and increased accessibility. All of these changes will make Taraval more inviting for everyone that uses it.

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Project Timeline 
2014 - 2017
Design and community outreach
Early implementation and loading zone pilot
2019 - 2021
Construction Seg A
2022 - 2024
Construction Seg B
Cost Estimate
$90 Million
Current Phase or Stage
Predicted Completion
Segment B: Fall 2024
Project Status
Implementation / Construction
Project Success
On budget
On schedule
Muni Metro train
Boarding Islands
SFMTA Accessibility icon
Key Stop Ramps at Boarding Islands
New Trees and Streetscape Elements
Muni Metro train
Transit Only Lanes
Updated Traffic Signals and Crosswalks
Bus Routes and Rail Lines
Taraval Street
Project Details, History or Features
Upgraded sewer and water lines, permanent boarding islands and increased accessibility are on the way!

Construction Project Elements

Just in time for the L Taraval to turn 100 years old, the corridor will get much-needed improvements to the Muni system and underground sewer and water lines. The project brings together the SFMTA, Public Utilities Commission, and Public Works to upgrade the vital system that help the community thrive. 

Project elements

  1. Rail track and overhead line replacement
  2. Water and sewer line replacement
  3. Surface repaving
  4. Curb ramp upgrades
  5. Concrete boarding islands and pedestrian bulbs
  6. Traffic signals
  7. New trees and landscaping

The streetscape style elements including tree selection, decorative crosswalks, trackway accent colors and public art were based on community feedback and will make the corridor an even more inviting to residents and visitors alike.

Construction Segments

In order to minimize disruptions during construction and maximize flexibility, the project is split in two construction segments that will overlap. During various times, there will be bus substitutions for the L Taraval so that crews can work on the rails and infrastructure beneath them. 

Segment A: San Francisco Zoo to Sunset Boulevard

Segment B: Sunset Boulevard to West Portal

Map of Construction Scope and Segments A and B


What to Expect During Construction

Please see our project updates for construction work forecast on the right hand column.

  • Work hours are 7:00am-5:00pm Monday to Friday, 8:00am to 5:00pm weekend **Subject to change based on construction work needs**
  • Driving access in both directions 
  • Pedestrian access
  • Local access (access to stores and residential homes) when streets and intersections are closed for work
  • Traffic may need to be detoured when streets are closed for work
  • Construction zones will be a few blocks at a time
  • Bus shuttle service is planned during track replacement work. L Taraval Muni service will be available through a combination of bus and train throughout the entirety of construction. 

Overhead Contact System (OCS) Poles 

As part of the project's work to upgrade the corridor's aging infrastructure, new overhead contact system (OCS) pole foundations will be constructed to replace the existing poles. These poles are essential to providing support and tension for Muni's Overhead Contact System to keep the L Taraval light rail vehicles running. In addition, it also serves the dual function of illuminating the streets of the Taraval corridor and the path of travel for the Muni L Taraval.

The new OCS poles will be approximately 2-3 feet to the left or right of the existing pole. During construction, you may see both the new and exisitng OCS poles. This is temporary until the construction crew is able to remove the aged OCS pole. 

photo of an overhead contact system pole                photo of the overhead contact system pole foundation


Segment B Stop Changes

To improve safety and reliability while retaining access to key destinations, several additional stop changes are planned as part of the project.

  • Taraval and 17th Avenue (eastbound) will be relocated from the near side to the far side of the intersection once the new island is constructed.
  • 15th Avenue and Taraval (eastbound) will be removed once the boarding island at 17th Avenue is constructed
  • Ulloa and Forest Side (eastbound and westbound) will be relocated to Ulloa and 14th Avenue

Project Details

Comprehensive transit and pedestrian safety features will enhance the safety of passengers getting on and off Muni and make the L Taraval more reliable. Block by block features including stop changes, boarding island locations and turn restrictions are highlighted below.

Taraval corridor project details: transit and pedestrian safety features46th to 43rd avenue new boarding island locations43rd to 40th Avenue new boarding island locations39th Avenue to Sunset Boulevard new pedestrian bulbs, turn restrictions and accessible platform locations 39th Avenue to Sunset Boulevard new pedestrian bulbs, turn restrictions and accessible platform locations continued33rd Avenue to 29th Avenue new boarding island locations28th Avenue to 25th Avenue new boarding island and traffic signal locations24th to 21st avenue new pedestrian bulb, transit island extension, traffic signal and turn restriction locations20th Avenue to 16th Avenue new boarding islands, pedestrian bulbs, traffic signals and relocated stop locations15th Avenue to Forest Side Avenue stop changes, new transit bulb and pedestrian bulb locations


This project was made possible in part by Proposition K Sales Tax dollars provided by the San Francisco County Transportation Authority


Muni Forward
San Francisco County Transportation Authority logo
San Francisco Water Power Sewer logo
San Francisco Public Works logo
Transbay Joint Powers Authority
Vision Zero SF logo
Contact Information
Sevilla Mann