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Regularity rally
A regularity rally, also called time-speed-distance or TSD rally, is a type of motorsport rally with the object of driving each segment of a Course in a specified time at a specified average speed. The rally is usually conducted on public roads, but sometimes includes off-road and track sections. Contestants usually compete in teams composed of an amateur driver and navigator. Teams usually start a regularity rally at fixed intervals, creating a field that is spread along the course.
== Origins ==
Regularity rallying shares its origins with most types of rallying. Unlike the well-known 'special stage rallying' (which is commonly just called rallying), regularity rallying does not depend on the abilities of the driver at high-speed nor does it depend on the speed that the vehicle can achieve. For this reason, ordinary motor vehicles can be used. (Regularity rallies are commonly held for classic or even vintage cars, see below.) Regularity rallying, therefore, is a far less expensive sport and can be enjoyed by a far greater spectrum of people. With the commercialisation and increasing competitiveness of special stage rallying, many people have been financially excluded from the sport and have therefore created many cheaper alternatives (see Categories of rallies). The closest motor sport to regularity rallying is road rallying. Unlike a road rally, a regularity rally focuses somewhat more on the maintenance of precise speeds and times rather than on navigation. Navigation does, however, still play an important role in regularity rallying.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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