automated cable propulsion system consists of a stationary motor and cables with the train cars fixed to the cables. The stationary motor for the train system will be located in the land station, and will be connected to cables running down the length of the tunnel. The train cars, fixed to these cables, will be moved up and down the tunnel solely from the power of the land motor. This system is advantageous because separating the motor from the train cars will decrease noise in the tunnel. This decreases noise because the motor is the main source of noise in this train system. With the motor separate from the train cars, noise in the cars and tunnel will be minimized. Another advantage of this system is that a separate motor results in less mechanical parts in the car, which also mean less repairs on the actual train cars. Cars and logistic Systems Rubber wheels were chosen over other types of wheel, such as steel, to minimize noise. Rubber wheels have a property of making little noise as they roll on surfaces such as plexiglass. The noiseless train will serve two purposes, transferring guests and supplying the underwater hotel. Supplies will be packed on land, and delivered efficiently to the hotel to minimize the space taken up by goods in the hotel. Cars transferring supplies will feature palettes, and cars transferring passengers will provide a view of the ocean. The guest transporting aspect of the train will have a maximum efficiency of 1000 people per hour. Underwater hotel The underwater hotel will be a jellyfish like structure. The underwater hotel will be located 20 meters underneath the surface of the ocean. To handle the underwater pressures, the hotel's main structure is a dome composed of plexiglass, reinforced with concrete and steel. The underwater hotel will be composed of 220 underwater suites with a cost of $5500 per night. In addition to the underwater suites, Hydropolis is planned to have many other underwater accommodations including restaurants, a spa, a cinema, a ballroom, and bars. The underwater hotel is planned to not only be a place for regular guests, but also a place for visitors to explore. References External links dubai.com Proposed buildings and structures in Dubai Hotels in Dubai