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A time attack is a type of motorsport where the race cars compete against a clock, and not directly against each other. Each car is timed through one circuit of the track, and there are no other cars on the track at that time. The car makes a preliminary circuit, then runs the timed lap, and then finishes with a cool-down lap. Time attack and time trial events differ by competition format and rules. Time attack has a limited number of laps, time trial has open sessions. Unlike other timed motorsport disciplines such as sprinting and hillclimbing, the car is required to start off under full rolling start conditions following a warm up lap where they will have to accelerate out as fast as possible to determine how fast they enter their timed lap.〔(Time Attack FAQ's )〕 Commonly, as cars consist of modified road going cars, cars are required to have tires authorized for road use. Time attack events began in Japan in the mid-1960s. They have since spread around the world. ==United States== National Auto Sport Association Time Trial (NASA TT) series is a national auto competition program, utilizing regional series based on a time trial style format, with rules that establish car classifications to provide a contest of driver skill. NASA TT is designed to bridge the gap between NASA HPDE (High Performance Driving Events), and wheel-to-wheel racing. NASA TT provides a venue for spirited on-track competition with a high degree of both safety and convenience. NASA TT competition will take place during NASA HPDE-4 sessions or in separate TT run groups, depending on the event schedule and number of participants. In addition to having a set of National NASA TT Rules, the rules, safety guidelines, and driving requirements of the HPDE-4 program apply to NASA TT. These rules can be found in the NASA CCR (Club Codes and Regs). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Time attack」の詳細全文を読む スポンサード リンク
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