Research methods: The research was made on the principle for working out turnout design parameters, the analysis was made for choosing turnout parameters by railway and metro and the rational design parameters of single crossover were ascertained. Then the safety of single crossover was checked by calculation and the rational structure of single crossover was selected.
Research conclusions: If the single crossover with 3.4 m distance between centers of lines is adopted in metro, the values of design parameters for turnout will not smaller than that of simple turnout at both ends. Under this condition, the running safety of train and comfortableness can be guaranteed when the subway train passes through the single crossover at the tolerated through speed of 30 km/h. The program of connection structure of single crossover is rational, which provides reliable support to design of single crossover with 3.4 m distance between centers of lines.
2006, Vol. 23 
