aerial tram

An aerial tramway, sky tram, cable car, ropeway, aerial tram, telepherique, or seilbahn is a type of aerial lift which uses one or two stationary ropes for support while a third moving rope provides propulsion. With this form of lift, the grip of an aerial tramway cabin is fixed onto the propulsion rope and cannot be decoupled from it during operations.
In comparison to gondola lifts, aerial tramways generally provide lower line capacities and higher wait times.

Terminology

Because of the proliferation of such systems in the Alpine regions of Europe, the French and German names, ''téléphérique'' and ''Seilbahn'', respectively, are often also used in an English language context. ''Cable car'' is the usual term in British English, as in British English the word ''tramway'' generally refers to a railed street tramway while in American English, ''cable car'' may additionally refer to a cable-pulled street tramway with detachable vehicles; e.g., San Francisco's cable cars. As such, careful phrasing is necessary to prevent confusion.

It is also sometimes called a ''ropeway'' or even incorrectly referred to as a gondola lift. A gondola lift has cabins suspended from a continuously circulating cable whereas aerial trams simply shuttle back and forth on cables. In Japan, the two are considered as the same category of vehicle and called ''ropeway'', while the term ''cable car'' refers to both grounded cable cars and funiculars. An aerial railway where the vehicles are suspended from a fixed track (as opposed to a cable) is known as a suspension railway.

Overview

An aerial tramway consists of one or two fixed cables (called ''track cables''), one loop of cable (called a ''haulage rope''), and one or two passenger or cargo cabins. The fixed cables provide support for the cabins while the haulage rope, by means of a grip, is solidly connected to the truck (the wheel set that rolls on the track cables). An electric motor drives the haulage rope which provides propulsion. Aerial tramways are constructed as ''reversible systems''; vehicles shuttling back and forth between two end terminals and propelled by a cable loop which stops and reverses direction when the cabins arrive at the end stations. Aerial tramways differ from gondola lifts in that gondola lifts are considered ''continuous systems'' (cabins attached onto a ''circulating'' haul rope that moves continuously).

Two-car tramways use a ''jig-back'' system: a large electric motor is located at the bottom of the tramway so that it effectively pulls one cabin down, using that cabin's weight to help pull the other cabin up. A similar system of cables is used in a funicular railway. The two passenger or cargo cabins, which carry from 4 to over 150 people, are situated at opposite ends of the loops of cable. Thus, while one is coming up, the other is going down the mountain, and they pass each other midway on the cable span.

Some aerial trams have only one cabin, which lends itself better for systems with small elevation changes along the cable run.

History

The first design of an aerial lift was by Croatian polymath Fausto Veranzio in Gdańsk. It was moved by horses and used to move soil over the river to build defences. It is called the first known cable lift in European history and precedes the invention of steel cables. It is not known how long this lift was used. In any case, it would be another 230 years before Germany would get the second cable lift, this newer version equipped with iron wire cable.

In mining

Tramways are sometimes used in mountainous regions to carry ore from a mine located high on the mountain to an ore mill located at a lower elevation. Ore tramways were common in the early 20th century at the mines in North and South America. One can still be seen in the San Juan Mountains of the US state of Colorado.

Other firms entered the mining tramway business—Otto, Leschen, Breco Ropeways Ltd., Ceretti and Tanfani, and Riblet for instance. A major British contributor was Bullivant who became a constituent of British Ropes in 1924.

Moving people

In the beginning of the 20th century the rise of the middle class and the leisure industry allowed for investment in sight-seeing machines. Prior to 1893 a combined goods and passenger carrying cableway was installed at Gibraltar. Initially its passengers were military personnel. An 1893 industry publication said of a two-mile system in Hong Kong that it "is the only wire tramway which has been erected exclusively for the carriage of individuals" (albeit workmen). After the pioneer cable car of 1907 at Mount Ulia ( San Sebastián, Spain) by Leonardo Torres y Quevedo and the Wetterhorn Elevator (Grindelwald, Switzerland) in 1908, others to the top of high peaks in the Alps of Austria, Germany and Switzerland resulted. They were much cheaper to build than the earlier rack railway.

One of the first trams was at Chamonix, while others in Switzerland, and Garmisch soon followed. From this, it was a natural transposition to build ski lifts and chairlifts. The first cable car in North America was at Cannon Mountain in Franconia, New Hampshire in 1938.

Many aerial tramways were built by Von Roll Ltd. of Switzerland, which has since been acquired by Austrian lift manufacturer Doppelmayr. Other German, Swiss, and Austrian firms played an important role in the cable car business: Bleichert, Heckel, Pohlig, PHB (Pohlig-Heckel-Bleichert), Garaventa and Waagner-Biró. Now there are three groups dominating the world market: Doppelmayr Garaventa Group, Leitner Group, and Poma, the last two being owned by one person.

Some aerial tramways have their own propulsion, such as the Lasso Mule or the Josef Mountain Aerial Tramway near Merano, Italy.

Urban transport

While typically used for ski resorts, aerial tramways have been ported over for usage in the urban environment in recent times. The Roosevelt Island Tramway in New York City, the Cable cars in Haifa Israel and the Portland Aerial Tram are examples where this technology has been successfully adapted for public transport purposes.

Telpherage

The telpherage concept was first publicised in 1883 and several experimental lines were constructed. It was designed to compete not with railways, but with horses and carts.Lusted, A., 1985: The Electric Telpherage Railway. Glynde Archivist 2:16–28.

The first commercial telpherage line was in Glynde, which is in Sussex, England. It was built to connect a newly opened clay pit to the local railway station and opened in 1885.

Double deckers

There are aerial tramways with double deck cabins. The Vanoise Express cable car carries 200 people in each cabin at a height of over the Ponturin gorge in France. The Shinhotaka Ropeway carries 121 people in each cabin at Mount Hotaka in Japan. The CabriO cable car to the summit of the Stanserhorn in Switzerland carries 60 persons, with the upper floor accommodating 30 people in the open air.

File:Shinhotaka ropeway01s3200.jpg, Shinhotaka Ropeway
File:20180617 S-Bahn-R 5105 (48401307962).jpg, Stanserhorn cabriolet ropeway with adapted pylon

Records

* First – Adam Wybe's construction in Gdańsk (1644). It was the first rope railway with many supports and the biggest built until the end of 19th century.
* Longest (at time of building) and years operated:
** 1906–1927 Chilecito – Mina La Mejicana, Argentina ( and branch).
** 1925–1950 Dúrcal – Motril, Spain ( and branch).
** 1937–1941 Asmara – Massawa, Eritrea ( and branch), technically a Funifor.
** 1943–1987 Kristineberg-Boliden, Sweden. still working as Norsjö aerial ropeway.
* Second longest:
** 1959–1986 Moanda – Mbinda, Gabon – Republic of Congo.
* Longest over water:
** 1906 – the same century; Thio, New Caledonia. ship loading.
** 1941–2006 Forsby-Köping limestone cableway, Sweden. crossing of Hjälmaren strait. 42 km system.
** 2007 Nha Trang City – Vinpearl Land, Hon Tre Island, Vietnam. Total length 3.3 km.
* Longest currently operational:
** Norsjö aerial tramway Mensträsk-Bjurfors in Norsjö, Sweden. Passenger tramway, a section of the former 96-km Kristineberg-Boliden industrial ropeway.
** 12.5 km (7.8 mi) Mérida cable car Mérida, Venezuela.
** Grindelwald–Männlichen gondola cableway, Switzerland
** Wings of Tatev, Armenia, the world's longest reversible cable car line of one section.
** Medeu-Shimbulak tramway near Almaty, Kazakhstan.
** Sandia Peak Tramway, reversible tramway in Albuquerque, New Mexico.
* Highest lift:
** from at Chilecito – Mina La Mejicana, Argentina (drops back to at upper terminal).
* Highest lift currently operational:
** 3188 m (10,459 ft) from 1,577 MSL to 4,765 MSL (5,174 FAMSL to 15,633 FAMSL) Mérida cable car, Venezuela.
* Highest station:
** Greater than 1935-19?? Aucanquilcha, Chile.
* Lowest station:
** below sea level Masada cableway, Israel.
* Tallest support tower:
** Cat Hai – Phu Long cable car, Vietnam.
* As mass transit:
** The Roosevelt Island Tramway in New York City was the first aerial tramway in North America used by commuters as a mode of mass transit (See Transportation in New York City). Passengers pay with the same farecard used for the New York City Subway.
** The Portland Aerial Tram in Portland, Oregon, was opened in January 2007 and became the second public transportation aerial tramway in North America.
** In Medellin, Colombia, both the Metro and the recent Metrocable aerial tramway addition can be used while paying a single fare.
* Largest rotating cars:
** Palm Springs Aerial Tramway in Palm Springs, California.

List of accidents

Despite the introduction of various safety measures (back-up power generators, evacuation plans, etc.) there have been several serious incidents on aerial tramways, some of which were fatal.
* August 29, 1961: A military plane split the hauling cable of the Vallée Blanche Aerial Tramway on the Aiguille du Midi in the Mont Blanc massif: six people killed.
* July 9, 1974: Ulriksbanen