This research paper surveys the types of automatic gates, their advantages and drawbacks. New folding gates are analyzed; their moment of inertia during the movement is several times less than of common gates of the same width. Vibrations of common and folding automatic gates are also analyzed in the research. During the experimental survey a coefficient of tightness has been determined. Computer based program has been used for the analytical analyses. The most proper masses of construction knots and most optimum coefficients of tightness and suppression are chosen according to the optimum opening speed of the gates.