城市道路环形交叉口改十字信号交叉口案例分析

结合福州市罗星西路与青洲路环形交叉口改造工程,经多方案、多因素比选确定环形交叉口改为十字信号交叉口方案.详细分析了此城市环形交叉口改为十字信号交叉口案例,利用理论计算饱和度与Vissim仿真相结合的定量分析方法进行验证.结果显示:该优化设计方案可以显著提高交叉口的通行效率;在交叉口景观设计方面,提出渠化岛植树思路,分析了渠化岛植树的效益及适用条件,阐述了植树位置、树种配置、行车横向净距、行车安全净空及相应交通管制措施的要求,以适应特殊地区的交叉口景观设计,为渠化岛上等待信号灯过马路的行人及非机动车驾驶者遮阴纳凉.

A Case Study of Urban Road Roundabouts to Cross Signal Intersection

Combining with roundabouts of engineering practice between Luoxing west road and the Qingzhou road in Fuzhou city,the author put forward a scheme that roundabouts should be changed to cross signal intersection after the comparison of multiple solutions and multiple factors and analyzed the cases that roundabouts were changed to signal intersections in this city carefully. In addition,by using the theoretical calculation of saturation and Vissim simulation combined with quantitative analysis,the author verified the optimized design scheme could significantly improve the traffic efficiency of the intersection. In terms of the intersection of landscape design,the author put forward a thinking about channelized traffic island which is planting,analyzed the benefits and suitable conditions of channelized traffic island planting and elaborated the planting locations, the configuration of tree species,driving transverse spacing,safety clearance and the requirement of corresponding traffic control measures to adapt to the intersection of landscape design of this special area and provide shade for pedestrians and non-motor vehicles drivers waiting for the signal to cross the road in channelized traffic island.