An additional lane has been reopened to traffic on 4th Street between Howard and Folsom streets.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction work on Stockton Street in Union Square has paused for the holiday season. Work within the station sites, underground work, and night work has continued. See your neighborhood section below for details.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

• On 4th Street between Harrison and Bryant streets, construction of the portal continues.
  • Closure of this section of 4th Street through the end of February 2015.

Northern SoMa (Market to Harrison): Construction crews are excavating the area along 4th Street between Howard and Folsom streets.

• On 4th Street between Market and Mission streets, night work pipe installation is scheduled for Dec. 14 to Dec. 19 from 10 p.m. to 7 a.m.

Union Square: Construction crews have converted Stockton Street between Ellis Street and Geary Boulevard into a holiday plaza called “Winter Walk SF.”

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North Beach: Construction crews are restoring the retrieval shaft site.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

People enjoy “Winter Walk SF” on Stockton Street in Union Square. More information is available on our blog.

Project Advancements

December 6 - December 15, 2014

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction work on Stockton Street in Union Square has paused for the holiday season. Work within the station sites, underground work, and night work has continued. See your neighborhood section below for details.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

• At the intersection of 4th and Brannan streets, sewer line work is scheduled for Dec. 8 to Dec. 12.
  • Night work hours from 10 p.m. to 7 a.m.
• On 4th Street between Harrison and Bryant streets, construction of the portal continues.
  • Closure of this section of 4th Street through the end of February 2015.

Northern SoMa (Market to Harrison): Construction crews are building walls along 4th Street between Howard and Folsom streets.

• Temporary closure of covered sidewalk along 4th Street from Howard to Clementina streets from 8 p.m. Dec 8 to 5 p.m. Dec 12.
  • Pedestrians may access Clementina Street from 5th Street.

Union Square: Construction crews have converted Stockton Street between Ellis Street and Geary Boulevard into a holiday plaza called “Winter Walk SF.”

• On Ellis Street between Stockton and Powell streets, pile installation to construct underground station walls.
  • Night work hours from 10 p.m. to 6 a.m.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North Beach: Construction crews are restoring the retrieval shaft site.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

On Dec. 3, San Francisco Mayor Ed Lee, the Union Square Business Improvement District, the San Francisco Municipal Transportation Agency and the Central Subway officially kicked-off “Winter Walk SF” in Union Square – an open plaza for the public to enjoy. This festive, pedestrian-friendly holiday hub runs through January 1 on Stockton Street between Ellis Street and Geary Boulevard.

Mayor Lee welcomes the public to the holiday plaza and encourages people to shop locally.

Holiday activities include: a nightly light art show, carolers, live music, food trucks and promotional incentives.

The public is encouraged to check out “Winter Walk SF” and it’s nightly light art show.

San Francisco Municipal Transportation Agency (SFMTA) Director Ed Reiskin lists ways to get around the city – public transportation, bike, on foot and by vehicle.

More details and scheduled events can be found here.

This post covers the next two weeks. Our next update will be on Friday, Dec. 5. Happy Thanksgiving from the Central Subway team!

The contractor opened the roadway decks to pour concrete for a gateway structure that will allow the T Third Line an entry/exit onto 4th Street.

During the next 17 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

• At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
    • On 4th Street between Harrison and Bryant streets, one traffic lane will be available until Nov. 26.
  • Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
• On 4th Street between Harrison and Bryant streets, construction of the portal continues.
  • Tentative closure of 4th Street between Harrison and Bryant streets on Nov. 29 between midnight and 6 a.m.
  • Closure of 4th Street between Harrison and Bryant streets starting Dec.1 through end of February 2015.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

Union Square: Construction crews are converting portions of Stockton Street between Ellis Street and Geary Boulevard into a holiday plaza called “Winter Walk SF.”

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North Beach: Construction crews are restoring the retrieval shaft site.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

A welder fuses two metal plates together at the end of the day.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

• At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
    • On 4th Street between Harrison and Bryant streets, one traffic lane will be available starting Nov. 20 through Nov. 26.
  • Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
• On 4th Street between Bryant and Welsh streets, AT&T vault installation continues.
  • Muni service impact: The bus stop on Bryant Street at 4th Street has been relocated to the mid-block of Bryant Street between 4th and 5th streets until Nov. 25.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

• On 4th Street between Folsom and Harrison streets, sewer line replacement continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 4 p.m.
  • Parking in this area may be limited.

Union Square: Construction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane. Work on restoring portions of this area for the holidays continues.

• For a look at the restoration work on Stockton Street, click here.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

• On Washington Street between Stockton and Spofford streets, replacement of a high pressure water line and installation of a fire hydrant continues.
  • Work hours are Monday to Friday, 7 a.m. to 5 p.m.
  • Parking may be impacted in the vicinity of the construction area.

North Beach: Construction crews continue to restore the retrieval shaft site.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

Under 4th Street, between Harrison and Bryant streets, work continues at the launch box site. This site is where tunnel boring machines, Mom Chung and Big Alma, were launched last year. The launch box is now being transformed into a portal (gateway structure).

This rendering shows what the portal may look like upon completion.

The portal will bring the light rail vehicles to the surface and vice-versa, thereby connecting the north and south quadrants of the city. The construction of the portal includes building walls, a floor/ramp and back filling the area. The walls and floor are being strengthened by inserting metal re-bar into the structure.

The floor of the portal is gradually being built into a ramp.

The portal walls are being reinforced with re-bar.

 Metal bracing is being installed to support the walls.

Visible surface construction activity for the portal will be seen in December. The portal is estimated to be completed by the 2nd quarter of 2015.

Workers are installing concrete walls for the future tunnel portal. The portal will be used as an entrance/exit for the extension of the T Third Line being constructed underground on 4th Street between Harrison and Bryant streets.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

• At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
    • On 4th Street between Harrison and Bryant streets, one traffic lane will be available starting Nov. 20 through Nov. 26.
  • Access to Interstate 80 freeway may be limited on some evenings from 8 p.m. to 5 a.m. and during weekends.
• On 4th Street between Bryant and Welsh streets, AT&T vault installation continues.
  • Muni service impact: Starting Nov. 12 through Nov. 25 the bus stop on Bryant Street at 4th Street is anticipated to be relocated to the mid-block of Bryant Street between 4th and 5th streets.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

• On 4th Street between Folsom and Harrison streets, sewer line replacement continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 4 p.m.
  • Parking in this area may be limited.

Union Square: Construction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane. Preparations have started to restore portions of this area for the holidays.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

• On Washington Street between Stockton and Spofford streets, replacement of a high pressure water line and installation of a fire hydrant continues.
  • Work hours are Monday to Friday, 7 a.m. to 5 p.m.
  • Parking may be impacted in the vicinity of the construction area.

North Beach: Construction crews continue to restore the retrieval shaft site.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

The Central Subway Project started deploying ambassadors to assist pedestrians. This is part of a pilot program to help keep Sunday foot traffic moving in the heart of the downtown area.

An ambassador assists people at the intersection of
Stockton and O’Farrell streets.

An ambassador gives directional help to pedestrians.

For updates on project advancements, sign up for our weekly construction update here or follow us on Facebook, Twitter, Flickr, or YouTube.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system.

Happy Halloween!

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow all traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

• At the intersection of 4th and King streets, utility potholing is scheduled for Nov. 3 and 4.
  • Night work hours between 7 p.m. and 5 a.m.
• At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
  • Access to Interstate 80 freeway may be limited on some evenings between 8 p.m. and 5 a.m.
• On 4th Street between Brannan and Freelon streets, potholing continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3:30 p.m.
• Along Townsend Street between 4th and 5th streets, street light conduit installation continues.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

• Tentative: On 4th Street between Folsom and Harrison streets, sewer line replacement is anticipated to start on Nov. 4.

Union Square: Construction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane.

• AT&T night work will begin on Nov. 3 through Nov. 5 from 1 to 5 a.m.
  • Street closure of O’Farrell Street between Powell and Stockton streets.
  • Local deliveries and construction equipment allowed during the closure.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North Beach: Construction crews continue to restore the retrieval shaft site.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.

Station walls are being constructed at 933-939 Stockton Street for the future Chinatown Station.

During the next 10 days, Central Subway work continues at sites in SoMa, Union Square, Chinatown and North Beach. This post contains brief updates about recent construction activities and a look-ahead for what to expect in each neighborhood. For more detailed information, click here or on the links below. You can also find construction, traffic detour, and Muni impact information on our project Google Map.

Construction schedules may change due to unforeseen conditions. We encourage the public to follow all traffic and pedestrian notifications posted at the work sites.

Southern SoMa (Harrison to King): Construction crews are relocating and installing new utilities along 4th Street from Harrison to King streets.

• Tentative: At the intersection of 4th and King streets, potholing work on Nov. 3 and 4.
  • Night work between 7 p.m. and 5 a.m.
• At the intersection of 4th and Harrison streets, work on a high pressure water line continues.
  • Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3 p.m.
  • Access to Interstate 80 freeway may be limited on some evenings between 8 p.m. and 5 a.m.
• On 4th Street between Bryant and Brannan streets, potholing and installation of a sewer line continues.Two traffic lanes will remain open Monday to Friday, 7 a.m. to 3:30 p.m.

Northern SoMa (Market to Harrison): Construction crews are building walls and replacing a water line along 4th Street between Howard and Folsom streets.

• Tentative: Along 4th Street between Folsom and Harrison streets, sewer line replacement to start by the end of October.

Union Square: Construction crews are excavating the site, building station walls and relocating utilities on Stockton Street between Ellis Street and Maiden Lane.

Chinatown: Construction crews are building station walls and installing new utilities on Stockton Street between Sacramento and Washington streets.

North Beach: Construction crews continue to restore the retrieval shaft site.

We thank the businesses, residents, shoppers, and commuters of San Francisco for their continued engagement with this significant investment in the extension of our public transportation system. When opened in 2019, the Central Subway will provide a much-needed connection between major employment, retail, cultural and residential areas of the city.