|Owner||San Francisco Municipal Transportation Agency|
|Area served||Chinatown, Embarcadero, Financial District, Fisherman's Wharf, Nob Hill, North Beach, Russian Hill, Union Square|
|Transit type||Cable car|
|Number of lines||3|
|Number of stations||62|
|Daily ridership||20,100 (2014)|
|Annual ridership||7,409,400 (2014)|
|Headquarters||San Francisco Cable Car Museum|
|Operator(s)||San Francisco Municipal Railway|
|Character||Street running with some reserved right-of-ways|
|Number of vehicles|
|Train length||1 grip car|
|No. of tracks||2|
|Track gauge||3 ft 6 in (1,067 mm)|
|Top speed||9.5 mph (15.3 km/h)|
San Francisco Cable Cars
|Location||1201 Mason Street, San Francisco (car barn)|
|Architect||Andrew Smith Hallidie|
|NRHP reference No.||66000233|
|Added to NRHP||October 15, 1966|
|Designated NHL||January 29, 1964|
The San Francisco cable car system is the world's last manually operated cable car system. An icon of San Francisco, the cable car system forms part of the intermodal urban transport network operated by the San Francisco Municipal Railway. Of the 23 lines established between 1873 and 1890, only three remain (one of which combines parts of two earlier lines): two routes from downtown near Union Square to Fisherman's Wharf, and a third route along California Street. While the cable cars are used to a certain extent by commuters, the vast majority of their seven million annual passengers are tourists, and as a result, the wait to get on can often reach two hours or more. They are among the most significant tourist attractions in the city, along with Alcatraz Island, the Golden Gate Bridge, and Fisherman's Wharf. The cable cars are listed on the National Register of Historic Places.
In 1869, Andrew Smith Hallidie had the idea for a cable car system in San Francisco, reportedly after witnessing an accident in which a streetcar drawn by horses over wet cobblestones slid backwards, killing the horses.
The first successful cable-operated street running train was the Clay Street Hill Railroad, which opened on August 2, 1873. The promoter of the line was Hallidie, and the engineer was William Eppelsheimer. The line involved the use of grip cars, which carried the grip that engaged with the cable, towing trailer cars; the design was the first to use grips. The term "grip" became synonymous with the operator.
The line started regular service on September 1, 1873, and its success led it to become the template for other cable car transit systems. It was a financial success, and Hallidie's patents were enforced on other cable car promoters, making him wealthy.
Accounts differ as to the precise degree of Hallidie's involvement in the inception of the line, and to the exact date on which it first ran.
The next cable car line to open was the Sutter Street Railway, which converted from horse operation in 1877. This line introduced the side grip, and lever operation, both designed by Henry Casebolt and his assistant Asa Hovey, and patented by Casebolt. This idea came about because Casebolt did not want to pay Hallidie royalties of $50,000 a year for the use of his patent. The side grip allowed cable cars to cross at intersections.
In 1878, Leland Stanford opened his California Street Cable Railroad (Cal Cable). This company's first line was on California Street, and is the oldest cable car line still in operation. In 1880, the Geary Street, Park & Ocean Railway began operation. The Presidio and Ferries Railway followed two years later, and was the first cable company to include curves on its routes. The curves were "let-go" curves, in which the car drops the cable and coasts around the curve on its own momentum.
In 1883, the Market Street Cable Railway opened its first line. This company was controlled by the Southern Pacific Railroad and would grow to become San Francisco's largest cable car operator. At its peak, it operated five lines, all of which converged on Market Street to a common terminus at the Ferry Building. During rush hours, cars left that terminus every 15 seconds.
In 1888, the Ferries and Cliff House Railway opened its initial two-line system. The Powell–Mason line is still operated on the same route today; their other route was the Powell–Washington–Jackson line, stretches of which are used by today's Powell–Hyde line. The Ferries & Cliff House Railway was also responsible for the building of a car barn and powerhouse at Washington and Mason, and this site is still in use today. In the same year, it also purchased the original Clay Street Hill Railway, which it incorporated into a new Sacramento–Clay line in 1892.
In 1889, the Omnibus Railroad and Cable Company became the last new cable car operator in San Francisco. The following year the California Street Cable Railroad opened two new lines, these being the last entirely new cable car lines built in the city. One of them was the O'Farrell–Jones–Hyde line, the Hyde section of which still remains in operation as part of the current Powell–Hyde line.
In all, twenty-three lines were established between 1873 and 1890.
Evolution of motive power
Originally, the cables were powered by stationary steam engines. For the initial three cables, the Ferries & Cliff House Railway constructed a three-story structure to house two 450-horsepower coal-burning steam engines. The building was complete with a 185-foot-tall smokestack to vent away the heavy black smoke created by the Welsh anthracite coal that the company burned. Expansion of service required two additional 500-horsepower coal-fired steam engines in 1890, and the number and type of engines continued to vary over time. Coal consumption in 1893 was about 10 tons per day. The system was converted to oil in 1901, and the lessened amount of smoke allowed the smokestack to be shortened to 60’; this shortened smokestack still exists at Washington-Mason today.
Electric energy started to come in by 1912, when a 600-horsepower General Electric motor came on-line. By 1926, all steam operation of the cable ended when a second complete electrical drive was installed, a 750-horsepower General Electric product. With reduction in the number of cable car lines, the single 750-horsepower electric motor took over the job of running all of the lines. The problem with that configuration was that if one cable car on one line broke down, all lines had to be stopped. After the 1984 reconstruction, each of the four cables for the three lines (California, Hyde, Mason and Powell) is separately powered by its own 510-hp electric motor.
By the beginning of 1906 many of San Francisco's remaining cable cars were under the control of the United Railroads of San Francisco (URR), although Cal Cable and the Geary Street Company remained independent. URR was pressing to convert many of its cable lines to overhead electric traction, but this was met with resistance from opponents who objected to what they saw as ugly overhead lines on the major thoroughfares of the city center.
Those objections disappeared after the 1906 San Francisco earthquake. The quake and resulting fire destroyed the power houses and car barns of both the Cal Cable and the URR's Powell Street lines, together with the 117 cable cars stored within them. The subsequent race to rebuild the city allowed the URR to replace most of its cable car lines with electric streetcar lines. By 1912, only eight cable car lines remained, all with steep gradients impassable to electric streetcars. In the 1920s and 1930s, these remaining lines came under pressure from the much improved buses of the era, which could now climb steeper hills than the electric streetcar. By 1944, the only cable cars remaining were the two Powell Street lines – by then under municipal ownership, as part of Muni – and the three lines owned by the still-independent Cal Cable.
Fight to remain open
In 1947, Mayor Roger Lapham proposed the closure of the two municipally owned lines. In response, a joint meeting of 27 women's civic groups, led by Friedel Klussmann, formed the Citizens' Committee to Save the Cable Cars. In a famous battle of wills, the citizens' committee eventually forced a referendum on an amendment to the city charter, compelling the city to continue operating the Powell Street lines. This passed overwhelmingly, by 166,989 votes to 51,457.
In 1951, the three Cal Cable lines were shut down when the company was unable to afford insurance. The city purchased and reopened the lines in 1952, but the amendment to the city charter did not protect them, and the city proceeded with plans to replace them with buses. Again Klussmann came to the rescue, but with less success. The result was a compromise that formed the current system: a protected system made up of the California Street line from Cal Cable, the Powell–Mason line already in municipal ownership, and a third hybrid line formed by grafting the Hyde Street section of Cal Cable's O'Farrell-Jones-Hyde line onto a truncated Powell–Washington–Jackson line, now known as the Powell–Hyde line.
This solution required some rebuilding to convert the Hyde Street trackage and terminus to operation by the single-ended cars of the Powell line, and also to allow the whole system to be operated from a single car barn and power house. Much of the infrastructure remained unchanged from the time of the earthquake.
By 1979, the cable car system had become unsafe; it needed to be closed for seven months for urgently needed repairs. A subsequent engineering evaluation concluded that it needed comprehensive rebuilding at a cost of $60 million. Mayor Dianne Feinstein, who took charge of the effort, helped win federal funding for the bulk of the rebuilding job. In 1982 the cable car system was closed again for a complete rebuild. This involved the complete replacement of 69 city blocks' worth of tracks and cable channels, the complete rebuilding of the car barn and powerhouse within the original outer brick walls, new propulsion equipment, and the repair or rebuild of 37 cable cars. The system reopened on June 21, 1984, in time to benefit from the publicity that accompanied San Francisco's hosting of that year's Democratic National Convention.
Since 1984, Muni has continued to upgrade the system. Work has included rebuilding of another historical car, the building of nine brand new replacement cars, the building of a new terminal and turntable at the Hyde and Beach terminus, and a new turntable at the Powell and Market terminus.
The cable cars are principally used by tourists rather than commuters. The system serves an area of the city that is already served by a large number of buses and trolleybuses. The two lines on Powell Street (Powell–Hyde and Powell–Mason) both serve only residential and tourist/shopping districts (Union Square, Chinatown, North Beach, Nob Hill, Aquatic Park and Fisherman's Wharf), with the "downtown" end of both lines a substantial distance from the Financial District. The California Street Line is used more by commuters, due to its terminus in the Financial District.
In 2006, then-Mayor Gavin Newsom reported that he had observed several conductors pocketing cash fares from riders without receipt. The following year, the San Francisco auditor's office reported that the city was not receiving the expected revenue from cable cars, with an estimated 40% of cable car riders riding for free. Muni's management disputed this figure and pointed out that safe operation, rather than revenue collection, is the primary duty of conductors. In 2017, after an audit showing that some conductors were "consistently turn[ing] in low amounts of cash", as well as a sting operation, one conductor was arrested on charges of felony embezzlement.
Among U.S. mass transportation systems the cable cars have the most accidents per year and per vehicle mile, with 126 accidents and 151 injuries reported in the 10 years ending 2013. In the three years ending 2013 the city paid some $8 million to settle four dozen cable car accident claims.
The system was shut down in March 2020 to protect operators during the COVID-19 pandemic, as cable cars do not offer a compartment separating them from passengers (unlike Muni buses, which kept running). Limited service on all three lines resumed on August 2, 2021. Full revenue service began on September 4. On September 9, a valve failure caused the fire suppression system in the carbarn to activate, shutting down electric power to the powerhouse. As of September 13, 2021[update], service is expected to resume in late September.
Cables and grip
The cable cars are pulled by a cable running below the street, held by a grip that extends from the car through a slit in the street surface, between the rails. Each cable is 1.25 inches (3.2 cm) in diameter, running at a constant speed of 9.5 miles per hour (15.3 km/h), and driven by a 510 horsepower (380 kW) electric motor located in the central power house (see below), via a set of self-adjusting sheaves. Each cable has six steel strands, with each strand containing 19 wires, wrapped around a sisal rope core (to allow easier gripping). To protect the cable, each one is coated with a tar-like material which serves as a sacrificial lubricant - much like a pencil eraser erodes away rather than the paper. To start and stop the movement of the car, the gripman (see below) closes and opens the grip around the cable (similar to the clutch of a conventional car). The grip's jaws exert a pressure of up to 30,000 pounds per square inch (210,000 kPa) on the cable. Due to wear and tear, a grip's dies have to be replaced after three days of usage.
There are four separate cables: one 16,000-foot (4,900 m) length and one 10,300-foot (3,100 m) length for the Hyde and Mason segments, a 9,300-foot (2,800 m) length for their common Powell section, and one 21,000-foot (6,400 m) length for the California Street line.
Apart from the cable itself (which exerts a braking force when going downhill), the cable cars use three separate braking systems:
- Metal brake shoes on the wheels, which the gripman operates via a pedal. (On the Powell–Mason line, they can also be activated by the conductor, via a lever at the back of the car.)
- Wooden brake blocks pressed against the track when the gripman pulls a lever. The four blocks are made of Douglas fir and can produce a smell of burning wood when in operation. They have to be replaced after just a few days.
- An emergency brake consisting of a piece of steel, around 1.5 inches thick and 18 inches long, suspended beneath the car and pushed into the track slot when the gripman pulls a lever. It wedges tightly into the slot and often has to be removed with a welding torch.
San Francisco cable car system
The current cable car network consists of three routes. The Powell–Hyde and Powell–Mason lines use "single-ended" cars, which must be looped or turned around like a bus at the end of the line; the single-ended cable cars use manual non-powered turntables to rotate the car. There are three street turntables to do this, one at the end of each of the three terminals: at Market & Powell Streets, Taylor & Bay Streets, and Hyde & Beach Streets, with a fourth turntable located inside the car barn on Washington and Jackson Streets.
- The Powell–Mason (Line 59) line shares the tracks of the Powell–Hyde line as far as Mason Street, where it crosses Washington and Jackson Streets. Here the line turns right and downhill along Mason Street, briefly half left along Columbus Avenue, and then down Taylor Street to a terminal at Taylor and Bay. This terminus is near to but two blocks back from the waterfront at Fisherman's Wharf. As with the Powell–Hyde, there are manually-powered turntables at each end to reverse the cars. This line is also used greatly by tourists, but also some commuters.
- The Powell–Hyde (Line 60) line runs north and steeply uphill from a terminal at Powell and Market Streets, before crossing the California Street line at the crest of the hill. Downhill from this crest it turns left and uphill again along Jackson Street (as this is one-way, cable cars in the opposite direction use the parallel Washington Street), to a crest at Hyde Street. Here it turns right and steeply downhill along Hyde Street to the Hyde and Beach terminal, which is adjacent to the waterfront at the San Francisco Maritime Museum. The line was spliced together using remnant portions of the O'Farrell, Jones & Hyde line and the Washington–Jackson line. Manually-powered turntables turn the cable cars around at the two ends. This line is used greatly by tourists and often has long queues.
- The California Street (Line 61) line runs east and west on California Street from a terminal at California and Market Streets, close to the famed Embarcadero to Van Ness Avenue. The California street cable-cars use double-ended cars with "grip" levers at either end of the longer cars which are operated in each direction without the cars being turned at the ends of the line, where the double tracks converge into a single "stub-end" track. The line once ran a much longer distance from Presidio Avenue to Market Street but service west of Van Ness Avenue was discontinued in 1954. Calls to restore the route to its original length are heard from time to time but nothing serious towards this end has been proposed. This route runs only on California Street, running at first uphill to the summit of Nob Hill, then more gently downhill to a terminus at Van Ness Avenue. This line is used to a greater extent by commuters, with majority of passengers on weekdays being commuters.
There is also a set of non-revenue tracks from the California Street line along Hyde Street to join the Powell–Hyde line at Hyde and Washington. This connection exists to enable California Street cars to reach the car barn.
A small signal tower controls the crossing of the lines at the intersection of California Street and Powell Street. It has been rebuilt in 1907, 1937, 1967, and 2020–2021.
The system generally starts operating at 5:30am each day and shuts down at 1:30am.
The cable car system connects at both its terminals on Market Street with the F Market heritage streetcar line. The Taylor and Bay terminal, and the Hyde and Beach terminal, are both short walks from the F Market line. The system connects with other MUNI lines and BART at the Powell & Market and California & Drumm terminals.
Fares and revenues
As of January 1, 2020, riding a cable car costs $8 for a single ride, except for seniors riding before 7am or after 9pm when the senior fare is $4. $8 Cable Car Souvenir Tickets are sold in advance and include a San Francisco souvenir as well as a single ride. Beside these single ride tickets, cable car rides are included in monthly Muni passes, as well as 1-day, 3-day, 7-day passes, and the CityPASS program. Passes loaded on a Clipper card can be read by the conductor with a mobile device. Transfers or fare receipts are not accepted. In the 1960s, the fare for a single ride was 15 cents.
In budget year 2012, sales of $6 Cable Car Souvenir Tickets totaled $4,125,386. $6 single rider tickets sold by the cable car conductors totaled $9,888,001. Based on both tickets only, daily ridership of the cable car system was more than 6400. By 2017, the San Francisco Chronicle described the cable cars as a "cash cow" for Muni, yielding a yearly revenue of around $30 million. Still, according to Mission Local, the cable car system had a $46 million operating deficit in 2019.
There are 27 cars in rotation when the system is operating. They come in two kinds:
- Single-ended cars serve the Powell–Hyde and Powell–Mason lines. These cars have an open-sided front section, with outward-facing seats flanking the gripman and a collection of levers that actuate the grip and various brakes. The rear half of the car is enclosed, with seats facing inward and entrances at each end and the car has a small platform at the rear. These cars are 27 feet 6 inches (8.4 m) long and 8 feet (2.4 m) wide and weigh 15,500 pounds (7,000 kg). They have a passenger capacity of 60, 29 of them seated. These cars must be rotated to reverse direction at each end of the line, an operation performed on turntables. Most of these cars were built or rebuilt in the 1990s at Muni's Woods Carpentry Division.
- Double-ended cars serve the California Street line. These cars are somewhat longer, having open-sided grip sections at both ends and an enclosed section in the middle. These cars are 30 feet 3 inches (9.2 m) long and 8 feet (2.4 m) wide and weigh 16,800 pounds (7,600 kg). They can hold 68 passengers, 34 of them seated. The California Street line lacks turning capabilities at each end, resulting in the necessity of the double-ended cars. Some of these cars are genuine former O'Farrell, Jones, and Hyde Street cable cars, while some of these cable cars were built in 1998 at Muni's Woods Division/Woods Carpentry Division.
Both types of car ride on a pair of four-wheel trucks, to fit the track's 3 ft 6 in (1,067 mm) narrow gauge. The term California Street car, as in a car running on the California Street line, should not be confused with the term California Car. The latter term applies to all the cable cars currently operating in San Francisco, and is a historical term distinguishing this style of car from an earlier style where the open grip section and the enclosed section were separate four-wheel cars (known as the grip car and trailer).
There are 28 single-ended cars available for operation on the Powell lines and 12 double-ended cars on the California Street line. The cable cars are occasionally replaced with new or restored cars, with the old cars being moved to storage for later restoration. There are two cable cars in storage in the cable car museum / power house inside the car barn: car numbers 19 and 42, which were used on the Sacramento-Clay and O'Farrell, Jones and Hyde Street lines, respectively.
Car barn, power house, and museum
The cable-car barn is located between Washington and Jackson Streets just uphill of where Mason Street crosses them. Cars reverse into the barn off Jackson Street and run out into Washington Street, coasting downhill for both moves. To ensure that single-ended cars leave facing in the correct direction, the car barn contains a fourth turntable. Cars are moved around the car barn with the assistance of a rubber-tired tractor.
As of 2018, the cable-car barn was staffed with 17 mechanics, six custodians, three carpenters, two painters, two supervisors and one superintendent.
The car barn is situated directly above the power house and the Cable Car Museum. The museum's entrance is at Washington and Mason. It contains several examples of old cable cars, together with smaller exhibits and a shop. Two galleries allow the visitor to overlook the main power house, and also to descend below the junction of Washington and Mason Streets and see the large cavern where the haulage cables are routed out to the street via huge sheaves.
The car is driven by the grip, whose job requires strength, coordination, and balance. The grip must smoothly grip and release the cable, know the points at which the grip must be released to coast over intersecting lines or places where the cable does not follow the tracks, and maintain clearance from other traffic. The conductor collects fares, manages crowding, and controls the rear-wheel brakes on some hills.
On the second or third Thursday each July, a cable car bell-ringing contest is held in Union Square between cable car crews, following a preliminary round held during the second to last or the last week of June. The preliminary round determines which contestants go on to the finals in Union Square, by a process of points awarded by a panel of judges.
- "Transit Ridership Report Fourth Quarter and End-of-Year 2014" (PDF). American Public Transportation Association (APTA). March 3, 2015. Retrieved March 14, 2015 – via http://www.apta.com/resources/statistics/Pages/ridershipreport.aspx.
- Kamiya, Gary (February 8, 2014). "How S.F.'s cable cars were saved after an uphill battle". SFGate. Retrieved April 13, 2016.
- "Ride the Cable Car Lines". Market Street Railway. Retrieved April 13, 2016.
- "National Register Information System – (#66000233)". National Register of Historic Places. National Park Service. July 9, 2010.
- Dillon, James. "San Francisco Cable Cars" (pdf). National Register of Historic Places – Inventory Nomination Form. National Park Service. Retrieved May 21, 2012.
- NHL Summary
- The Eight Original San Francisco Cable Car Companies, Cable Car Museum. Retrieved March 19, 2012.
- Paul Elias/The Associated Press: San Francisco's iconic cable cars cost city millions of dollars in legal settlements. Yahoo! News, April 15, 2013
- Guthrie, Julian (April 11, 2003). "Cable car line turns 125 / S.F. celebrates birthday of workhorses of California St". San Francisco Chronicle. Retrieved October 1, 2016.
- "Anatomy of how cable cars operate". Cable Car Museum. Retrieved November 17, 2008.
- "When Stationary Steam Engines Powered the Cable". Walter Rice Ph.D. and Emiliano Echeverria, The Cable Car Home Page. Retrieved May 16, 2021.
- "San Francisco Cable Car– the Gripping Tale of an Aged Compact". Tony Hogg, Road & Track, April 1962 (accessed on CableCarMuseum.org). Retrieved May 16, 2021.
- "Repairing San Francisco's old cable cars". Christian Science Monitor. Celia Herron, The Christian Science Monitor, April 9, 1981. April 9, 1981. Retrieved May 16, 2021.
- Of Cables and Grips: The Cable Cars of San Francisco, Second Edition. Robert Callwell & Walter E. Rice, Ph.D., March 2005, (accessed on The Cable Car Home Page). ISBN 978-0-9726162-2-5. Retrieved May 16, 2021.
- "Museums in Motion – 1984 – Rejuvenation". Market Street Railway. Retrieved October 19, 2007.
- Matier, Phillip; Ross, Andrew (April 23, 2017). "Muni looks at ending cash fares on cable cars". San Francisco Chronicle. Retrieved April 24, 2017.
- "Audit: SF Cable Cars Lacking In Fare Enforcement". KTVU. Archived from the original on November 1, 2007. Retrieved May 13, 2007.
- "San Francisco's cable cars shut down to protect operators from coronavirus". SFChronicle.com. March 17, 2020. Retrieved March 26, 2020.
- Sweet, Lolita (August 2, 2021). "From Market Street to Fisherman's Wharf, Cable Cars Return" (Press release). San Francisco Municipal Transportation Agency.
- Johnson, Pamela (September 2, 2021). "Celebrating 148 Years of Cable Cars in San Francisco" (Press release). San Francisco Municipal Transportation Agency.
- "Cable Car Shutdown Update" (Press release). San Francisco Municipal Transportation Agency. September 13, 2021.
- Knight, Heather (December 14, 2018). "While decorating a cable car, I discovered the magic of San Francisco — again". www.sfchronicle.com. Retrieved January 4, 2019.
- "Cable Cars: How they work - The Brakes". www.cablecarmuseum.org. Retrieved October 1, 2016.
- Thompson, Joe. "San Francisco Municipal Railway". The Cable Car Home Page. Joe Thompson. Retrieved March 1, 2016.
- "Cable Cars 1954: A Huge Loss". Market Street Railway. March 29, 2016. Retrieved September 11, 2016.
- "Cal Cable's Hyde & California Street Car Barn & Powerhouse". Cable Car Guy. March 1, 2004. Retrieved September 13, 2016.
- Menzies, Jeremy (March 29, 2021). "SFMTA's Cable Car Signal Tower Gets a Refresh" (Press release). San Francisco Municipal Transportation Agency.
- "Cable Car Single Ride". August 4, 2017.
- "2013 2014 SFMTA Budget Book" (PDF). sfmta.com. July 1, 2012. Retrieved June 13, 2018.
- Eskenazi, Joe (March 1, 2021). "The Muni Death Spiral: San Francisco rolling toward recovery — or ruin". Mission Local. Retrieved June 16, 2021.
- "Powell Street Cable Car". Retrieved April 16, 2010.
- "California Street Cable Car". Retrieved April 16, 2010.
- "Cable Car Fleet Roster". Retrieved April 16, 2010.
- "2008: 46th Annual Cable Car Bell-Ringing Contest". Retrieved July 10, 2008.
- "Cable Car Bell Ringing Contests". Retrieved August 11, 2011.
- "The Cable Car Home Page – Cable Car Bell Ringing Contest". Retrieved February 12, 2014.
- Val Lupiz and Walter Rice (2004). "San Francisco: cable cars are here to stay". Tramways & Urban Transit, October 2004, pp. 376–378. Light Rail Transit Association and Ian Allan Publishing Ltd. ISSN 1460-8324
- Robert Callwell and Walter Rice (2000). Of Cables and Grips: The Cable Cars of San Francisco. Friends of the Cable Car Museum.
- "Cable Railway Edition". Mining and Scientific Press. San Francisco, CA. July 18, 1885.
|Wikimedia Commons has media related to Cable cars in San Francisco.|
- Cable Car Museum website
- Cable Cars Information on the official SFMTA website
- Market Street Railway Cable Car Page
- Historic American Engineering Record (HAER) No. CA-12, "San Francisco Cable Railway", 65 photos, 8 measured drawings, 114 data pages, 15 photo caption pages
- "San Francisco Cable Cars" (pdf). Photographs. National Park Service. Retrieved May 21, 2012.