为了对现有公交线网进行优化, 有效利用现有交通资源, 解决城市交通问题, 运用系统科学的思想, 通过对城市公交线网优化的主要内容、优化原则、优化目标以及约束条件的分析, 兼顾考虑乘客出行时间、公交线网密度和公交企业的利益以及公交线网的布局对整个城市的交通系统的影响, 提出了优化目标的函数表达式及相应约束条件的数学表达式, 建立了公交线网优化的线性模型, 并给出了运用逐步筛选法对所提出的数学模型进行求解的方法。

It is a useful method for solving the urban traffic problems by optimizing the public traffic network and effectively using the traffic source. After studing the main content, principle, objective and restriction condition of the public traffic network optimization, and considering the passengers travel time, public traffic network density, public traffic cooperation benefit and the entire city transportation system affected by the public traffic network arrangement, authors have set up the function formula of the optimization objective, restriction conditions formula, linear model of the public traffic network optimization and have used step by step filter method to solve the mathematical model.