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考虑异质交通流冲突的非机动车道宽度设计

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为降低超车过程中异质交通流间的冲突,在传统非机动车道宽度设计方法基础上,提出一种考虑异质交通流避让行为的设计方法.首先,采用减速群体占比和踏频值分析车辆的受干扰程度;其次,通过建立车-车作用力模型计算不同类型车辆间的作用力,拟合作用力与避让间距的关系求解安全避让距离,可得推荐非机动车道宽度为传统车道宽度及安全避让距离之和;然后,建立安全评价模型,评价不同宽度非机动车道的安全性,以验证该设计方法的合理性;最后,实例分析西安市4个路段非机动车道的骑行样本.结果表明:2车混行的非机动车道中,减速群体占比为传统非机动车道的0.93倍,骑行踏频值提高0.07圈/s,道路安全值是传统非机动车道的1.07倍,车道内的干扰更小,骑行者更为安全.
A methodology for non-motorized lane design considering heterogeneous traffic conflicts
In order to reduce conflicts between heterogeneous traffic flows during overtaking,a non-motorized lane width design method that considers avoidance maneuver in heterogeneous traffic was proposed.This method represents an improvement over the traditional design approach.Firstly,the conflict levels of non-motorized vehicles were analyzed through the deceleration group proportions and pedaling cadence.Secondly,a vehicle-to-vehicle force model was established to calculate the forces between different types of vehicles.The additional safety gap was determined based on the relationship between these forces and lateral width.The recommended non-motorized lane width was the sum of the traditional lane width and the additional safety gap.Then,the rationality of the proposed design method was evaluated based on the safety levels of non-motorized lanes with different widths,which was obtained from the safety evaluation model developed in this research.Finally,data from four non-motorized lanes in Xi'an city were analyzed as case studies.The research results show that the deceleration group proportion is 0.93 times,pedaling cadence increases by 0.07 revolutions per second,and the road safety value is 1.07 times compared to traditional non-motorized lanes in non-motorized lanes accommodating heterogeneous traffic.These findings demonstrate that lanes meeting the design width have lower conflicts and greater safety.

heterogeneous traffic-flownon-motorized lanewidth designvehicle-vehicle forcepedaling cadenceadditional safety gap

李岩、邵进、刘林建、梁淑娟、汪帆

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长安大学 运输工程学院,陕西 西安710064

常州市规划设计院,江苏 常州213000

中交第一公路勘察设计研究院有限公司,陕西 西安710075

异质交通流 非机动车道 宽度设计 车-车作用力 踏频值 安全避让距离

2024

中国安全科学学报
中国职业安全健康协会

中国安全科学学报

CSTPCD北大核心
影响因子:1.548
ISSN:1003-3033
年,卷(期):2024.34(10)