辽宁中部环线高速公路路线方案的选定

通过对辽宁中部环线高速公路路线方案布设过程进行分析,系统地总结路线方案选定的基本原则,提出路线布局的主要控制因素,对路线布局需要注意的几个问题进行分析,提出降低工程造价、优化路线方案的具体措施。     

路基压实机械的选择

根据不同土质的工程特点，路基工程中常用的压实机械的作用原理提出了选择压实机械的原则和方法，及施工中应注意的问题。     

处理大斜度简支板桥的一种实用方法

本文从高速公路工程施工角度出发,提出了处理大斜度简支板桥的一种经济简捷实用的方法＝墩、台顶设置异型块法。并给出了这种方法的工程应用实例。     

中俄国际交通走廊珲春国际港可行性分析

珲春市是"一带一路"东起点,也是吉林省借港出海唯一通道。滨海2号路线为长春—吉林—珲春—扎鲁比诺港,将吉林省与俄滨海边疆区海港连接起来,实现东北货物南运出境不出国。由于珲春—扎鲁比诺港路线尚处起步阶段,集疏运条件需要培育、磨合的过程,相较形成规模的渤海湾港口通道存在劣势。首先对标营口港路线运费标准,确定珲春节点具有经济性的腹地范围,再根据腹地企业确定相关货种,在保证完成浙吉两省合作任务的同时,确保项目的经济合理性。     

Modeling the day-to-day traffic evolution process after an unexpected network disruption

Although various approaches have been proposed for modeling day-to-day traffic flow evolution, none of them, to the best of our knowledge, have been validated for disrupted networks due to the lack of empirical observations. By carefully studying the driving behavioral changes after the collapse of I-35W Mississippi River Bridge in Minneapolis, Minnesota, we found that most of the existing day-to-day traffic assignment models would not be suitable for modeling the traffic evolution under network disruption, because they assume that drivers’ travel cost perception depends solely on their experiences from previous days. When a significant network change occurs unexpectedly, travelers’ past experience on a traffic network may not be entirely useful because the unexpected network change could disturb the traffic greatly. To remedy this, in this paper, we propose a prediction-correction model to describe the traffic equilibration process. A “predicted” flow pattern is constructed inside the model to accommodate the imperfect perception of congestion that is gradually corrected by actual travel experiences. We also prove rigorously that, under mild assumptions, the proposed prediction-correction process has the user equilibrium flow as a globally attractive point. The proposed model is calibrated and validated with the field data collected after the collapse of I-35W Bridge. This study bridges the gap between theoretical modeling and practical applications of day-to-day traffic equilibration approaches and furthers the understanding of traffic equilibration process after network disruption.