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在北京市实施公交改革、推动公共交通发展的背景下，以对北京市2006年初的地面公共交通线网评价为基础，应用地理信息系统技术，选取线路长度、线路网密度、线路重复系数、非直线系数、站点密度、平均站距、站点覆盖率等指标，对截至2007年8月已完成的五批大规模地面公交线网调整方案的效果进行了分析，明确了目前地面公共交通线网的总体特征和存在问题，为进一步实施公交线网优化方案、提高公交运行效率提供参考。

Readjustment Effect Analysis of Public Bus Networkin Beijing

To prioritize the issue of public bus development, a series of systematic reforms are being implemented in Beijing. Based on the evaluation of the public bus network in Beijing at the beginning of 2006, the paper has applied geographic information system (GIS) technology to analyze the readjustment effect of public bus network until August 2007, when five sets of public bus line adjustments were completed. The indexes such as the line length, network density, repetition coefficient, nonlinear coefficient, stop density, average distance between stops, and stop coverage were selected, to reveal the characteristics and the existing problems of the present public bus network. The results help to further optimize programs for improving the public bus efficiency.