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文章分析了影响快速路和主干路互通式立交方案设计的主要因素,并结合南宁市梁村大道-那元路互通式立交方案设计实例,提出快速路与主干路互通式立交方案设计的关键技术,对类似互通式立交方案设计具有一定的指导意义。 相似文献
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为了给互通式立交的安全性评价及设计提供指导,探讨高速公路互通式立交安全性评价的主要内容、设计重点、改善措施以及安全性评价方法。通过互通式立交的安全性设计要点对互通式立交的道路条件进行分析,结合相关交通安全理论,提出适用于互通式立交安全性评价的综合指标体系。同时,针对互通式立交设计中的关键要素,如车道宽度、视距、匝道出入口、运行速度等,给出相应的设计改善措施。 相似文献
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文章分析了城市非互通式立体交叉口存在的问题及其成因,并以甘肃省兰州市北滨河路和城关黄河大桥立交为实例,提出了四种改善方案,同时运用VIS-SIM仿真软件对所提出的改善方案进行模拟和对比,得出最优的改善方案,为非互通式立交交通改善提供理论依据。 相似文献
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介绍互通式立交的方案设计思路,最终采用的方案既满足交通量发展的需求,也尽可能利用已建工程,总结了互通式立交的特点和设计要点. 相似文献
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文章以南宁市白沙-友谊大道互通式立交为研究对象,介绍了其工程概况与地形地貌,并对其交通量进行预测分析,同时结合其立交功能定位阐述了该立交方案的选型设计思路,通过对互通式立交型式进行综合比选,推荐出了功能完善、造价低的互通方案,可为城市道路立交工程设计提供参考和借鉴。 相似文献
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受交通量的发展和路网新布局的形成等因素影响,已建的许多互通式立交面临改扩建。文章以重庆江津西彭互通式立交在原有A型单喇叭三路互通立交基础上改建成四路立交的工程为例,阐述了改扩建立交在选型和设计过程中的思路,总结了一些改扩建立交方案选择的原则,供同行参考。 相似文献
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文章基于古亭山互通式立交所处的地形地质概况及其交通量情况,从立交匝道布置及左转匝道主要技术指标方面,对所提出的小环道+半定向混合型设计方案和对称苜蓿叶+半定向混合型设计方案进行了比选,最终选定小环道+半定向混合型方案为可行的立交方案。 相似文献
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针对上海地区地下空间开发、轨道交通网络化发展以及城市密集区域工程建设的发展需求,对多线换乘地铁枢纽站改扩建、深层地基加固、地下深层障碍物清除、盖板逆筑、既有地下空间利用加层等多项施工新技术进行了研究和开发,并通过实际工程应用证实了各项技术的有效性,可为今后城市密集地区和复杂建设环境下的地下空间开发和施工建设提供借鉴。 相似文献
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Transit oriented development (TOD) has been an important topic for urban transportation planning research and practice. This paper is aimed at empirically examining the effect of rail transit station-based TOD on daily station passenger volume. Using integrated circuit (IC) card data on metro passenger volumes and cellular signaling data on the spatial distribution of human activities in Shanghai, the research identifies variations in ridership among rail transit stations. Then, regression analysis is performed using passenger volume in each station as the dependent variable. Explanatory variables include station area employment and population, residents’ commuting distances, metro network accessibility, status as interchange station, and coupling with commercial activity centers. The main findings are: (1) Passenger volume is positively associated with employment density and residents’ commuting distance around station; (2) stations with earlier opening dates and serving as transfer nodes tend to have positive association with passenger volumes; (3) metro stations better integrated with nearby commercial development tend to have larger passenger volumes. Several implications are drawn for TOD planning: (1) TOD planning should be integrated with rail transit network planning; (2) location of metro stations should be coupled with commercial development; (3) high employment densities should be especially encouraged as a key TOD feature; and (4) interchange stations should be more strategically positioned in the planning for rail transit network. 相似文献
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We propose a fuzzy logic control for the integrated signal operation of a diamond interchange and its ramp meter, to improve traffic flows on surface streets and motorway. This fuzzy logic diamond interchange (FLDI) comprises of three modules: fuzzy phase timing (FPT) module that controls the green time extension of the current phase, phase logic selection (PLS) module that decides the next phase based on the pre‐defined phase sequence or phase logic and, fuzzy ramp‐metering (FRM) module that determines the cycle time of the ramp meter based on current traffic volumes and conditions of the surface streets and the motorways. The FLDI is implemented in Advanced Interactive Microscopic Simulator for Urban and Non‐Urban Network Version 6 (AIMSUN 6), and compared with the traffic actuated signal control. Simulation results show that the FLDI outperforms the traffic‐actuated models with lower system total travel time, average delay, and improvements in downstream average speed and average delay. Copyright © 2011 John Wiley & Sons, Ltd. 相似文献
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多路互通式立体交叉的产生有其必然条件,文章在总结三路和四路立交形式的基础上,提出了五路和六路立体交叉的几种可能形式,并重点讨论了多路互通式立交布设时如何选择主线跨越方式、立交出口形式和左转匝道的类型。 相似文献