Car tracks with the launch of cars with a barrier
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— a barrier in this case is a device that blocks the track and opens at the touch of a button or lever. This type of start is used mainly in stunt tracks, where the car picks up acceleration, rolling down an inclined descent. The start is located at the beginning of the descent, and a special stopper blocks the road, preventing the car from moving down, and when the barrier is opened, this stopper is removed and the car rolls freely down the hill.