东南大学学报（英文版）2016，Vol.32Issue(2)：226-232,7.DOI:10.3969/j.issn.1003-7985.2016.02.016
城市快速路入口交织区通行能力模型
Capacity model of on-ramp merging section of urban expressway
摘要
Abstract
To establish the empirical capacity model of an on-ramp merging section, the Erlang distribution is first selected to define the time headway distribution, and then the gap acceptance theory is applied to develop the basic capacity model of the on-ramp merging section. Since not all the time headways on the shoulder lane can be made full use of by on-ramp vehicles, a modified capacity model is developed, which takes the usage probability of time headway into consideration. Then, a model of capacity discount coefficientξis developed. Finally, based on the modified capacity model and the model of capacity discount coefficient, an empirical merge capacity model which contains the shoulder lane volume, critical gap, and the distance from nose to merging point, is constructed. Results show that, compared with other models, the proposed model is more reasonable since it takes merging section geometry into consideration, and it is easy to apply. The merge capacity varies with the shoulder lane volume, the critical gap, the distance between the nose and the merging point, and the design velocity of the shoulder lane and ramp.关键词
交织区/经验通行能力模型/快速路/间隙接受Key words
merging section/empirical capacity model/urban expressway/gap acceptance分类
交通工程引用本文复制引用
曲昭伟,曹宁博,陈永恒,白乔文,孙磊..城市快速路入口交织区通行能力模型[J].东南大学学报（英文版）,2016,32(2):226-232,7.基金项目
The National Natural Science Foundation of China ( No.5127852051278220), the Science and Technology Development Project of Jilin Province ( No.20130206093SF) （ No.5127852051278220）
