An intelligent optimization algorithm with real strings based on state space model (SIA)was presented to solve bus dispatching problem in urban public transport system.The basic idea of genetic algorithm (GA)was introduced to SIA.The state evolution matrix was constructed to guide the search direction of the algorithm,then through the selection mechanism of selection pool to approach optimal solution.This algorithm and GA were applied to the public transport opti-mization dispatching problem.Mathematical model was set up by considering the time interval,and the benefit maximization of enterpri...