Mobility and Access

Where We Want to

Be in the Future

People waiting at bus stop on Grand Avenue
  • Travel in South San Francisco is safe and is perceived to be safe by all.

  • Transit is the first choice for regional travel. South San Francisco’s BART and Caltrain stations, and ferry terminal are all critical hubs of local and regional travel in the Bay Area.

  • SSF is a city where daily activities and functions can be performed without the need or desire for a single occupancy vehicle.

  • Plans and development activity emphasize transportation modes and strategies that ensure healthy air quality, reduce greenhouse gas emissions, and reduce the need to devote additional lands to transportation uses.

  • All South San Francisco residents have reliable access to commercial centers, schools, and recreation regardless of their mode of travel.



01Performance Metrics:

Transportation injury collisions


Eliminate severe injury and fatal collisions on the City’s roadway network


Total collisions between vehicles, pedestrians, and cyclists from 2009-2018: ≥481 Incidents

02Performance Metrics:

Ridership at South San Francisco BART, Caltrain, SamTrans, and ferry facilities.


Double SamTrans and BART ridership, quadruple ferry ridership, and achieve 10x growth in Caltrain ridership by 2040


  • South San Francisco BART station usage as of 2018: approximately 3,500 passengers on an average weekday
  • South San Francisco Caltrain station usage as of 2018: approximately 470 passengers per day
  • South San Francisco ferry ridership as of 2018: approximately 580 passengers per day

03Performance Metrics:

Mode split

Note: Mode split targets are citywide. Specific planning sub-areas, like East of 101, may have different targets to meet specific planning objectives.


Transit, walk, and bike trips account for 40 percent of all trips


04Performance Metrics:

East of 101 Area traffic volumes


East of 101 Area traffic volumes remain within the area’s street capacity


City to begin tracking data and provide in the future.

How Our Plan

Gets Us There

Building facade in South San Francisco

Transportation policy choices are key to achieving the equity, environment, and quality-of-life outcomes discussed throughout the General Plan. Currently, South San Francisco residents and employees have few convenient choices to travel without a car: approximately 90 percent of all trips by residents and over 80 percent of commute trips by employees occur via driving. The auto-centric nature of the city’s transportation system generates traffic congestion, greenhouse gas emissions, and inequitable access to jobs and services.

South San Francisco relies on transportation infrastructure that was built for a different era when life was lived closer to home and the city had more heavy industry and fewer people and jobs. Today’s reality is more regional in nature, spanning commutes between employment centers, goods movement, and travel to retail, medical, hospitality, and recreational facilities. Freeways are fully built out, yet traffic congestion continues to worsen. With the Bay Area expected to add another 1.5 million people in the next two decades, cleaner, less space-intensive forms of travel will be necessary to keep the region and South San Francisco moving. South San Francisco is well-positioned to capitalize on this shift, with access to two BART stations, a new Caltrain station expected to see a substantial increase in service, a ferry terminal serving regional commuters, and a local network of buses, shuttles, and bikeways. Nonetheless, further modernization of the city’s infrastructure is needed.

Health and safety are inextricably linked to the transportation system. Roadway collisions are the leading cause of death for people under the age of 55, and more than half of all road traffic deaths occur among vulnerable road users — pedestrians, bicyclists, and motorcyclists. For South San Francisco to achieve Vision Zero – eliminating all injury collisions on roadways – requires making tradeoffs to prioritize safety, such as reducing vehicle speed limits on local streets or allotting more street space to vulnerable users in the form of bikeways and sidewalks.

Transportation policy offers an opportunity to deliver mobility in a more equitable manner. On average, transportation is the second-largest cost for households, and the cost is largely driven by the location of one’s home in relation to jobs and services. Because housing is costly in San Mateo County, is it often the case that people earning less make the longest, most expensive commutes. Providing more housing close to job centers and prioritizing improvements for the city’s most vulnerable communities represent key strategies for realizing a more equitable mobility system.

Key Issues
and Opportunities

Modernizing the Transportation System
for a Growing City

As South San Francisco continues to experience growth and change, its transportation needs are increasingly mismatched with the infrastructure and services constructed years ago to support “the Industrial City.” This mismatch is especially apparent in the East of 101, Lindenville, and the El Camino Real sub-areas, where large auto-oriented streets are increasingly at-odds with higher density developments more oriented toward walking, biking, and transit use. In many areas of the city, residents and employees rely on driving for the vast majority of trips because there are few other viable options.

As the local and regional population grows the number of trips will also increase. Roadways cannot be expanded to accommodate a similar increase in vehicle trips and more trips must be made by non-auto modes. Local trips within South San Francisco should be made by walk, bike, scooter, and transit whenever possible.

Modernizing South San Francisco’s transportation system means giving people choices in how they travel within the city and region. It also means right-sizing the city’s transportation infrastructure, adding new streets and trail connections, and phasing out vestiges of the past like the city’s freight rail spurs. By building a more multimodal transportation network, South San Francisco can achieve a safe, multimodal, sustainable, livable, and connected city.


Capitalizing on Regional Transit Improvements to Realize Mode Shift
Connecting the City
for Multimodal Travel

Mobility Network

Street Network

In order to accommodate anticipated growth, the city’s street network will need to evolve in the coming decades. Streets in South San Francisco are categorized into five typologies: Boulevards, Connectors, Downtown Main Streets, Industrial, and Neighborhood Streets.

Map of Proposed Roadway Network


Boulevards (arterials) serve as primary routes to destinations within the city or through the city. These roadways are designed to prioritize mobility and person throughput for all types of road users. They can accommodate larger volumes of travelers. They typically have four to six travel lanes (both directions combined), larger sidewalks, and dedicated bicycle facilities. They may also include dedicated facilities for buses. Where the right-of-way is limited, user safety and person throughput (via vehicle, transit, bicycle, and foot) should be prioritized vehicle delay or parking.

Connectors and Downtown Main Streets

Connectors (collectors) are primary or secondary streets within the city that serve as corridors to major destinations. These streets are designed to provide mobility space for all travelers – vehicles, pedestrians, bicyclists, and transit riders. They also provide access to major destinations and denser residential or commercial areas and can accommodate moderate volumes of travelers. Connectors generally have two travel lanes, sometimes with short four lane segments or a center left turn lane. Connectors have sidewalks and provide on-street bicycle facilities and/or on-street parking.

Downtown streets are a special type of connector where mobility related to higher density commercial and housing converge into a single corridor in which people do business, live, and interact with each other. Downtown streets typically serve as destination corridors rather than through routes, with lower traffic speeds, higher pedestrian and bicycle volumes, and flexible use of curb space for high-turnover on-street parking, loading, bicycle parking, and parklets. These streets typically have narrower two-lane cross sections. Design is focused on providing a vibrant walkable setting conducive to local business activity.

Neighborhood and Industrial Streets

Neighborhood (local) streets are primarily located in residential neighborhoods. These streets provide local access to and between residential areas, commercial areas, schools, parks, and community centers. These streets typically have two travel lanes and on-street parking if street widths permit. They may incorporate design features to calm or discourage use by vehicles and prioritize their use as bicycle boulevards or slow streets.

Industrial streets are like neighborhood streets but are designed to serve the needs of manufacturing and goods movement businesses that need access by larger and heavier vehicles. Common vehicles often include vans, single unit trucks, and smaller semi-trucks. Industrial streets may have two vehicle lanes, and occasionally wider lane widths to accommodate larger vehicles. Industrial streets should have speed limits no greater than 25 mph.

Transit Priority Corridors

Some streets in South San Francisco warrant special consideration as transit priority corridors – corridors that serve high frequency bus and shuttle routes under existing or future conditions. Transit priority corridors primarily overlap with arterials and collectors, though they may occasionally consist of local streets. Designated transit priority corridors may evolve over time as bus and shuttle services change. Transit priority routes may incorporate design elements to prioritize transit speed and reliability and passenger experience.

Bicycle and Pedestrian Networks

Major Transportation

To support the city’s changing needs and transportation policy framework, various major transportation investments are needed, as summarized in the previous sections and illustrated below. The following table provides an inventory of these major transportation projects in relation to the overall transportation network, including the proposed changes and approximate cost. Projects of citywide or area-wide importance are marked as having a “high” level of City involvement, while projects with more local effects or contingent on individual developments or partnerships with other agencies are marked as having “medium” or “low” levels of City involvement. Additional information on smaller-scale street and active transportation projects may be found in planning documents such as the Active South City Plan. Although these projects alone cannot solve traffic congestion and person throughput needs, when paired with enhanced transit services and stronger transportation demand management programs, these projects can help support the city’s growth. In total, it is anticipated that the city will need roughly $1-1.2 billion in transportation upgrades over the next two decades to support buildout of the General Plan.

HighOyster Point BoulevardAddition of bus-only lanes between US-101 and ferry terminal6 lanes (two bus-only lanes) + bike lanes, 30 MPHBoulevard (Transit Priority Corridor)Adds capacity for East of 101 Area and improves first/last mile access to regional transit.$15M
HighEast Grand AvenueAddition of bus-only lanes between the Caltrain Station and Haskins Way, trail gap closure between Caltrain Station and Forbes Boulevard, and bus-only ramp to Poletti Way6 lanes (two bus-only lanes) + bike lanes, 30 MPH

(Bus-only ramp: 1 lane + multi-use trail, 25 MPH)
Boulevard (Transit Priority Corridor)Adds capacity for East of 101 Area and improves first/last mile access to regional transit$25M
HighNew East of 101 Trails

Three miles of new multi-use trails along Poletti Way and parallel to Forbes Boulevard, Eccles Avenue, and Harbor Way.N/AClass I BikewayExpands active transportation network and improves first/last mile access to regional transit$5M
HighUtah Avenue InterchangeExtension from South Airport Boulevard to San Mateo Avenue with connection to Produce Avenue with new US-101 ramps to be added in a second phase of work.

4 lanes + bike lanes, 25 MPHBoulevardConnects East of 101 Area and Lindenville and improves access to US-101$100M
HighHaskins WayHaskins Bridge connecting Haskins Way in the north to North Access Road to the south 4 lanes + multi-use trail, 40 MPHBoulevard

Adds capacity for East of 101 Area$130M
HighOyster Point Boulevard

Extension of Oyster Point Boulevard to Sierra Point via new bridge2 lanes + multi-use trail, 30 MPHBoulevardAdds capacity for East of 101 Area$50M
HighRailroad AvenueConnect Sylvester Road and Littlefield Avenue using railroad right-of-way2 lanes + bike lanes, 25 MPHConnectorImproves internal connectivity in East of 101 Area and supports corridor redevelopment$10M
HighSouth Spruce AvenueRoad Diet between El Camino Real and Railroad Avenue with protected bicycle lanes and widened sidewalks2 lanes + center turn lane + bike lanes, 30 MPHBoulevard (Transit Priority Corridor)Supports corridor redevelopment and complete streets goals$30M
HighSneath Lane Extension

Extension of Sneath Lane from Huntington Avenue to South Linden Avenue & connection between Maple Avenue & Huntington Avenue

4 lanes + bike lanes, 25 MPHBoulevard (Transit Priority Corridor)Connects Lindenville to San Bruno$20M
HighSouth Linden Avenue

South Linden Grade Separation & Tanforan Avenue Pedestrian Undercrossing2-4 lanes + bike lanes in places, 25 MPHBoulevardImproves internal connectivity in Lindenville & first/last mile access to BART$30M
HighNew Trail

Connect Centennial Way Trail and Bay Trail via US-101 overcrossing

N/AClass I BikewayImproves first/last mile access to BART$15M
MediumEl Camino ReaGrand Boulevard Modernization6 lanes + bike lanes, 30 MPHBoulevard (Transit Priority Corridor)Supports corridor redevelopment $30M
MediumSouth Airport BoulevardModernization to add median, protected bike lanes, enhanced bus stops, and wider sidewalks4 lanes + bike lanes, 30 MPHBoulevard (Transit Priority Corridor)Supports corridor redevelopment$15M
MediumGrand AvenueDowntown Streetscape Project2 lanes + bike lanes, 25 MPHDowntown Main Street Improves walkability and first/last mile access to Caltrain station $20M
MediumNew StreetNew street connecting Eccles Avenue to Forbes Boulevard between Rozzi Place and Gull Drive

2 lanes + bike lanes, 25 MPHConnectorImproves internal connectivity in East of 101 Area$10M
MediumNew StreetNew street connection between El Camino Real and Mission Road aligned with Sequoia Avenue, Grand Avenue, or Oak Avenue

2 lanes + bike lanes, 25 MPH NeighborhoodImproves east-west connectivity across Colma Creek

MediumSouth Canal Street / Mayfair AvenueClose South Canal Street as part of Colma Creek widening project and replace with an extension of Mayfair Avenue from South Spruce Avenue to South Linden Avenue2 lanes, 20 MPHNeighborhoodImproves internal connectivity in Lindenville$15M

Littlefield AvenueExtension from East Grand Avenue to Eccles Avenue via Cabot Road, Forbes Boulevard, and Carlton Court2 lanes, 25 MPHConnectorImproves internal connectivity in East of 101 Area$10M
LowPoint San Bruno BoulevardFormalize connection between Point San Bruno Boulevard and East Grand Avenue 2 lanes, 25 MPHConnectorImproves internal connectivity in East of 101 Area$10M
LowMyrtle AvenueExtension from South Spruce Avenue to South Linden Avenue

2 lanes, 25 MPH NeighborhoodImproves internal connectivity in Lindenville$10M
LowHarris Avenue

Connect cul-de-sac with E. Harris Avenue

2 lanes, 25 MPHNeighborhood

Improves internal connectivity in East of 101 Area$10M
LowRoebling RoadExtension across East 2 lanes, 25 MPH

NeighborhoodImproves internal $10M
Grand Avenue to proposed Railroad Avenueconnectivity in East of 101 Area
LowSwift AvenueExtend Swift Avenue to Littlefield Avenue2 Lanes, 25 MPHNeighborhoodImproves internal connectivity in East of 101 Area
LowWattis WayExtend Wattis Way to South Airport Boulevard

2 Lanes, 25 MPHNeighborhoodImproves internal connectivity in East of 101 Area
Contingency and other local streets and active transportation projects identified in other plans$200-400M

Total Cost, $2022$1-1.2B

Streets marked as “high” priority should provide a citywide or neighborhood-wide mobility benefit and should be advanced by the city’s public works department. Streets marked as “low” priority should be considered as redevelopment occurs at the applicable parcels and would primarily have a local mobility benefit. Streets marked as “medium” priority may be pursued by the city or considered as redevelopment occurs, and would provide a neighborhood-wide mobility benefit.
Costs are rough order-of-magnitude estimates based on previous analyses or comparable projects, rounded to the nearest $5 million in 2022 dollars. Costs do not include right-of-way acquisition if such actions are needed. Additional study is needed to refine the cost of each project.

Key Street Changes

A few streets across South San Francisco are expected to play outsized roles in accommodating changing land use and transportation conditions within the city. This section provides additional descriptions, conceptual layouts, and cross sections for these streets to serve as a starting point for planning activities.

Oyster Point
Boulevard Bus Lanes

Oyster Point Boulevard Bus Lanes

Oyster Point Boulevard will function as the primary or secondary route to access over 100,000 jobs in the East of 101 sub-area, representing one of the city’s biggest bottlenecks. In order to serve this demand and provide sufficient person-throughput along a constrained corridor, it is necessary to prioritize transit operations by adding bus lanes. Bus lanes allow for fast and reliable operations of regional express buses along with first/last mile services to Caltrain, BART and the ferry, while promoting the use of transit and stabilizing transit operating costs. Without bus lanes, bus and shuttle services will experience longer travel times and delays as the corridor develops, resulting in a negative feedback loop that increases operating costs while reducing the usefulness of these services.

Bus lanes may be accommodated on Oyster Point Boulevard between US-101 and Gull Drive through a combination of restriping, repurposing medians and turn lanes, and some widening along portions of the corridor (particularly east of Veterans Boulevard where the right-of-way narrows to roughly 85 feet). A 115 to 120 foot cross-section would accommodate a curbside bus lane and bike lane in each direction along with widened sidewalks while maintaining two through lanes for auto traffic, one left turn lane, and a median. In the westbound direction, bus-only lanes should extend to the US-101 northbound onramp to provide a seamless connection for buses traveling to San Francisco. At intersections where a second left turn lane is needed, the city may consider dynamic lane assignment to convert one left turn lane to a through-left lane during the AM peak period. To improve walkability and traffic operations while reducing conflicts along the corridor, the city may also consider restricting some lower-volume turning movements.

Map of Oyster Point Boulevard Concept


East Grand Avenue Bus Lanes and Caltrain Station Access
Haskins Way and Oyster Point Boulevard Bridges
Railroad Avenue
and Sylvester Road
El Camino Real and South Airport Boulevard Modernization
Sneath Lane Extension and South Linden Avenue Grade Separation
East of 101 Area Trail Network and Bay Trail-Centennial Way Trail Connection

Funding Plan

Funding for the approximately $1-1.2 billion in capital improvements would come from a combination of city, county, regional, state, federal, and private sector sources. Key funding sources include:

  • City funds: The City of South San Francisco funds transportation improvements through various sources. The primary source is via a Transportation Impact Fee (Resolution 120-2020). At current fees, the General Plan buildout could generate approximately $1 billion upon full buildout of the General Plan (although not all developments may ultimately be realized). The City is also considering a community facilities district (CFD) within the East of 101 Area to augment transportation funding for the district. Preliminary funding plans for the CFD expect it could generate approximately $160 to $290 million.
  • Private sector funds: Some transportation projects within the city may be partially or fully funded by the private sector as developments occur, particularly new streets, streetscape improvements, or trail connections within or alongside such developments.
  • County/regional grants and local return: The San Mateo County Transportation Authority and the City/County Association of Governments administer various grant programs funding highway, grade separation, bicycle & pedestrian, transit, and other local transportation projects. Funding for these county programs is primarily derived from the County’s Measure A and Measure W sales taxes and Measure M vehicle registration tax. The City also receives a dedicated local return from Measure A and Measure W. Additionally, the Metropolitan Transportation Commission and Bay Area Air Quality Management District periodically administer their own grant programs to fund various transportation improvements with an emphasis on equity and VMT reduction. Grant funding varies year to year.
  • State grants: The State of California administers several grant programs to fund transportation improvements with a focus on the state highway system, active transportation, and safety, including the State Transportation Improvement Program, Active Transportation Program, and Highway Safety Improvement Program. Grant funding varies year to year.
  • Federal grants:Various grant programs are distributed to cities directly or via state, regional, and county governments. Federal grants are primarily funded via the Surface Transportation Program and Congestion Mitigation and Air Quality Improvement Program. Grant funding varies year to year.

Some projects affecting regional transportation projects identified in the General Plan are expected to be primarily funded by county, regional, state, and/or federal sources, while other projects more local in nature may be funded primarily via the City with transportation impact fees and CFD funds or via the private sector.

Mobility Element Funding Summary

Funding SourceFunding ExpectationsFunding Expectations
Funding Emphasis

City (Transportation Impact Fee & potential Community Facilities District)$500-600M (50%)*Local projects focusing on city circulation needs.
Private Sector$100-120M (10%)Local projects on private right-of-way associated with new developments.
County/Regional$200-240M (20%)Larger projects of countywide and regional importance, especially those involving regional agencies.
State/Federal$200-240M (20%)

Person walking on bridge



Goal MOB-1

Goal MOB-1:

South San Francisco prioritizes safety in all aspects of transportation planning and engineering.


To advance the Vision Zero goal of zero traffic deaths and serious injuries on city streets by 2025 (Resolution 40-2021).
Policy MOB-1.1: Use a systemic safety approach to proactively identify and address safety risks.
  • Action MOB 1.1.1: Develop a Vision Zero Action Plan.
    Develop and implement a Vision Zero Action Plan that incorporates a prioritization approach for the Capital Improvement Program (CIP) and maintenance response process and identifies safety countermeasures to incorporate into all development projects and capital improvements.
Policy MOB-1.2: Strive to reduce vehicle speeds throughout the city to reduce the frequency and severity of collisions.
  • Action MOB 1.2.1: Incorporate traffic calming.
    Incorporate traffic calming treatments into all street projects to support lower design speeds.
  • Action MOB 1.2.2: Evaluate reducing speed limits.
    Evaluate reducing speed limits on the city’s high injury network, transit priority streets, school areas, and other streets with high concentrations of vulnerable street users.
Goal MOB-2
Goal MOB-3
Goal MOB-4
Goal MOB-5