A cable car is any of a variety of transportation systems relying on cables to pull vehicles along or lower them at a steady rate, or a vehicle on these systems. The vehicles are motor-less and engine-less pulled by cable that is rotated by motor off-board.
As the population is growing rapidly in the cities, the pressure on resources like land is immense. Furthermore, cost of land-transit system is increasing. Therefore, there is a need of new transport system that could cater services to this ever increasing population. Also, this system has to be sustainable, nominal in cost and can be easily build. Cable-Propelled Transit (CPT or cable for short) was effective mass transit in remarkably low cost. (Steven Dale) Similarly, the need of Cable Propelled Transit becomes clear in the real-world locations such as mountains, valleys and bodies of water. Cable Propelled Transit can be the efficient solution to the Transportation problem in Mountainous Areas too. Constructing the road requires huge amount of money and significantly affects the environment."The minimally invasive design enables ropeways to blend in almost imperceptibly with their surrounding- without harm to the visual impression of the tourist destination".
Aerially Lift 
In Aerial Transit System, cabins (also called carriers, vehicles, cable cars or simply cars) are suspended and propelled from above by cables. The cable which supports the cabin may or may not be the one that propels too. This depends on the technology used.
Mono-cable Detachable Gondola(MDG) 
Mono-cable Detachable (MDG) system has only one cable with does the work of supporting and also propelling.
Bi-cable Detachable Gondola (BDG) 
Bi-cable Detachable Gondola (BDG) has two cables – one for supporting the cabin. This cable is stationary while the other cable moves and serves the purpose of propulsion.
An aerial tramway consists of a cabin suspended from a cable, pulled by another cable.
3S/TGD- tri-cable detachable Gondola 
Tri-cable Detachable Gondola (TDG) has three cables of which two helps in supporting and the other for propulsion of cabin.
Pulsed Gondola 
It is used in transportation of goods rather than passenger.
Open chairs are hauled above the ground by means of cable.
Rail system 
In Bottom Supported System, cabins are supported by tracks or rails underneath but are propelled by a cable. Most of these types of cabins are supported by rails while one might find a cable supporting the cabin underneath in the rarest occasion. The San Francisco cable car system in North America is one example of it.
The various bottom supported system are:
Heritage Cable Car 
A funicular consists of a pair of railway cars that alternately ascend and descend an inclined right-of-way, attached to a common cable.
Hybrid Funicular 
Mini Metro 
CPT is different to conventional Transport Vehicles as it does not have engine or motor on board. Cabins are propelled by off-board motor that moves the cable connected to a Bullwheel. Cabins are gripped with the cable. So, as the cable moves so does the cabin. The detachable types (MDG, BDG or 3S) can be detached at the station. There are usually two bull wheels, the bigger one id rotated by the motor, also called drive wheel, and the freely spinning small one at the other end. Deflection wheels can be incorporated that could alter the direction of cable.
The cabin is permanently fixed on the cable. This was the system used earlier. This system has a disadvantage as stopping one cabin involves stopping the whole system. However, fixed grips system can achieve higher speed. This system does not allow mid-span station or even if it does, the station has to be in the middle.
Originally, all cabins were fixed. They could not be detached. In 1872, an Austrian National, Orbach invented the world’s first detachable grip and patented the technology.
The detachable cabin can be separated from the cable without disrupting the whole system. This allows the cabin to be stopped in between the stations with stopping the whole system. When the cabin approaches the stop, mechanism installed in the station un-grips the cabin and is slowed down by a different mechanism. This allows passengers to drop or get on the cabin. This method are readily used in MDG, BDG, TDG.
CPT has not yet been a widely accepted Transportation System. It needs to address some challenges.
Although, CPT has been around for a century, there have been not many research in this area. It has not been widely commercialized.
Integration of multiple CPT systems is not easy. The design of situation where systems meet at a station is still a challenge for the technology.
Transporting above someone's property causes privacy issue. Also, safety in case of emergency is a wide concern.
The longest cableway 
The world's longest operable cableway is the Forsby-Köping limestone cableway in Sweden at 42 km (26 mi). The longest ever in operation was the 96 km (60 mi) Kristineberg-Boliden ropeway conveyor in Sweden. One of its 8 sections has been converted to a gondola lift and is still operating as the 13.2 km Norsjö aerial tramway making it the world's longest passenger cableway.
Also worth mentioning are Skyrail Rainforest Cableway, a gondola lift in Australia is 7.5 km long (two sections), and the Swiss Gondelbahn Grindelwald-Männlichen is 6.2 km long (two sections). The longest reversible aerial tramway built in one section only is Wings of Tatev in Armenia at 5.7 km (3.5 mi).
See also 
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- Ekkehard, Assman. "The Golden Age of Gondolas Might Be Just Around the Corner". CEO, Doppelmyr. Retrieved (17 April 2013).
- Dale, Steven. "ABOUT THE GONDOLA PROJECT". Retrieved (2013, April 17).
- , Alshalalfah, B. W, Aerial Ropeway Transit: State of the ART. 2010
- [(http://gondolaproject.com/learn-the-basics-what-is-cable-propelled-transit/) "What is Cable Propelled Transit?"]. Retrieved ( 2013,19 April).
- "Image Brouchere". Doppelmayr.
- "Grips". Retrieved (2013, April 17).
- Henrik Ogstedt; Hanna Domfors (2010) (in swedish). Kalklinbanan: sammanställning och kulturhistorisk värdering (The limestone cableway: overview and cultural-historic evaluation) (Report). NIRAS Sweden AB. http://ekuriren.se/polopoly_fs/1.892044.1291909015!/Rapport%20Kalklinbanan%20101201.pdf.