ESTIMATE OF THE FACULTY OF ROAD AND A METHOD TO FORM THE PROGRAM OF ROAD NETWORK PROVISION

我们进行了一种方法的研究，以形成道路网提供方案如下：1.通过随机用户平衡，提出了道路为可变需求提供稳定交通服务能力的表示方法，即出行时间可靠性的概念; 2.将城市道路网络作为一个整体，提出了道路为城市活动提供各种出行服务能力的估计函数; 3.提出了预算条件、交通费用等约束条件的形成和处理方法，并对这些约束条件进行了分析。提出了一种高效、准确的道路网规划方案求解方法系统地进行优化，并通过应用遗传算法（GA）对优化结果进行比较。5.将该方法应用于某城市的实际路网规划中，并在项目期内求解出最优解。通过与经验丰富的工程师经验性方案的比较，说明了该方法的实用性和有效性，同时也指出了该方法的局限性和存在的问题。6.在国际研讨会上作了报告，并与国内外研究人员进行了交流。

We carried out the study on a method to form the program of road network provision as follows :1.Made the method to represent the faculty of road to provide stable traffic service for variable demand as the concept of the reliability of travel time by stochastic user equilibrium.2.Made a function to estimate various faculties of road taking service for the activities of the city as an urban road network.3.Made the formation and the means to deal with constraint conditions, such as budget conditions, adjustment with higher rank planning and the balance of regional development.4.Made an efficient and accurate solution procedure to make alternative road network systematically and to converge to the optimum solution, comparing with their estimation through the application of genetic algorithm(GA).5.Applied the method to the practical urban road network planning in a city, and solved the optimal solution in project period. Comparing the solution with an alternative program, which was made empirically by experienced engineer, made clear the practicality and validity of the method, also the limits and problems.6.Made presentation in an international symposium, and took exchange of views with home and foreign researchers.7.Worked up the result of the study into a report.