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A self-driving car, also known as a autonomous car (AC), driverless car, robotaxi, robotic car or robo-car, [1] [2] [3] is a car that is capable of operating with reduced or no human input. [ 4 ] [ 5 ] Self-driving cars are responsible for all driving activities, such as perceiving the environment, monitoring important systems, and controlling ...
It operates on two wheels placed side by side, a layout that differs in placement from motorcycles which instead have their two wheels placed at the front and rear. The PUMA design transfers the two-wheeled self-balancing characteristics of a Segway PT into a vehicle that can carry two passengers side by side at up to 35 miles per hour (56 km/h ...
The name is an abbreviation of Universal Wheel Drive System. [2] The Uni Wheel is intended to gain the advantages of individual wheel drive without having to mount the motor directly to, or inside, the wheel. Instead, it subsumes the functions of constant-velocity joints, drive shaft and reduction gearing into a single system within the wheel. [1]
Increases in the use of autonomous car technologies (e.g., advanced driver-assistance systems) are causing incremental shifts in the control of driving. [1] Liability for incidents involving self-driving cars is a developing area of law and policy that will determine who is liable when a car causes physical damage to persons or property. [2]
Between 1897 and 1901 Dugald Drummond of the London and South Western Railway used this wheel arrangement on two classes of divided drive locomotives, the T7 and E10 classes. The absence of coupling rods enabled the driving wheels to be more widely spaced than on a 4-4-0 locomotive and permitted the inclusion of a larger firebox [ 5 ]
The centers of engine and tender truck wheels are sometimes in one piece and sometimes made up of two parts, the hub or boss, and the # central filling piece. Face plates, front and back, are also used. The term is seldom applied to chilled, cast or rolled steel wheels. Driving and trailing wheel centers are made of cast iron or cast steel.
The closest devices are the hovercraft, which elevates itself above a water or level hard surface using a cushion of air retained by a flexible skirt, and the hovertrain, which is a type of high-speed train that replaces conventional steel wheels with hovercraft lift pads, and the conventional railway bed with a paved road-like surface, known ...
The symmetrical wheel arrangement was well suited for a tank locomotive that is used to work in either direction. When the leading and trailing wheels are in swivelling trucks, the equivalent UIC classification is 1'B1'. While a number of 2-4-2 tender locomotives were built, larger tender locomotive types soon became dominant.