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高速公路连续长下坡路段行车安全分析 总被引:7,自引:0,他引:7
连续长下坡路段是高速公路交通事故的多发路段,而载重汽车又占了肇事车辆的绝大多数.从车辆的运行特征、制动性能、超载行驶等方面分析了目前长下坡路段载重车辆事故多发的原因,并采用刹车毂的实测温度来评价车辆的制动性能,以此作为沿线避险车道、加水站等交通安全设施的设计依据. 相似文献
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从理论分析角度入手,阐述高速公路事故多发地点安全管控的具体内容和细节,通过对大小型车辆车速变化情况及事故多发路段车辆离散性等指标的检测与分析,对高速公路事故多发地点不同安全设施的作用进行研究。研究结果表明,在事故警告标志、减速标线、限速标志、超速抓拍4种交通安全设施中,减速标线对车辆产生的影响最大,能够有效控制车速,是提升高速公路行车安全的有效手段之一。 相似文献
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长大纵坡路段是山区高速公路事故高发地。文章针对云南省镇康至清水河高速公路在连续长大纵坡路段存在的越岭特长隧道选择、爬坡车道设置、避险车道设置等关键性问题,从平均纵坡、运行速度模拟、货车下坡制动温度等方面进行分析,提出优化纵断面设计、合理选择越岭隧道方式、合理设置避险车道等措施,为山岭重丘区高速公路在连续长大纵坡路段的方案设计提供参考。 相似文献
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本文在分析了避险车道现状问题和安全影响因素的基础上,通过货车在雅西高速公路上的制动鼓温度变化实车试验,建立货车在山区高速公路长大下坡路段行驶时的制动鼓温度变化模型,然后在试验的基础上建立一套适用于山区高速公路的避险车道设置位置理论计算方法,以此来确定避险车道的设置位置和设置间距. 相似文献
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针对高速公路交通安全影响因素,结合智慧高速公路建设,提出风险管控技术,主要包括曲线路段的可变限速方案和视线诱导方案、长下坡路段重载货车能量控制方案和监测方案,以期进一步保障高速公路交通安全。 相似文献
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Hojun “Daniel” Son Young-Jun Kweon Byungkyu “Brian” Park 《Transportation Research Part C: Emerging Technologies》2011,19(6):1353-1363
Typical engineering research on traffic safety focuses on identifying either dangerous locations or contributing factors through a post-crash analysis using aggregated traffic flow data and crash records. A recent development of transportation engineering technologies provides ample opportunities to enhance freeway traffic safety using individual vehicular information. However, little research has been conducted regarding methodologies to utilize and link such technologies to traffic safety analysis. Moreover, traffic safety research has not benefited from the use of hurdle-type models that might treat excessive zeros more properly than zero-inflated models.This study developed a new surrogate measure, unsafe following condition (UFC), to estimate traffic crash likelihood by using individual vehicular information and applied it to basic sections of interstate highways in Virginia. Individual vehicular data and crash data were used in the development of statistical crash prediction models including hurdle models. The results showed that an aggregated UFC measure was effective in predicting traffic crash occurrence, and the hurdle Poisson model outperformed other count data models in a certain case. 相似文献
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Abstract In an efficient transportation system, traffic safety is an important issue and it is influenced by many factors. In a country like Iran, until now safety improvements are mainly concentrated on road engineering activities, without much attention for vehicle technology or driving behaviour. One important aspect of road safety engineering activities is the so‐called treatment of hotspots or dangerous accident locations. Until recently, accident hotspots were identified and remedied by the esxperts’ personal judgements and a handful of statistics without taking into account other important factors such as geometric and traffic conditions of the road network. This paper therefore aims to define and identify the criteria for accident hotspots, then giving a value to each criterion in order to develop a model to prioritize accident hotspots when traffic accident data is not available. To do this, the ‘Delphi’ method has been adopted and a prioritization model is produced by the use of a ‘Multiple Criteria Decision‐Making’ method. The procedure is illustrated on a collection of 20 road sections in Iran. In addition, the model is validated against an existing database of road sections containing safe locations and hotspots. Finally, a sensitivity analysis is carried out on the proposed method. 相似文献
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为了制定科学的公路隧道施工安全评价的基本模式,针对公路隧道施工的危险、有害因素的危害程度及特殊工艺,将公路隧道施工系统分为隧道开挖、爆破、施工用电、施工通风、出碴与洞内运输、支护衬砌等6个主要子系统.运用预先危险性分析法(PHA)对公路隧道施工的危险、危害因素进行辨识和定性分析,结合作业条件危险性评价法(LEC)对公路隧道施工系统中各子系统进行危险性评价,定量分析计算PHA中的子系统各个危险因素的危险等级,并采用安全检查表(SCL)对公路隧道施工现场进行安全综合评价,建立了安全评价方法之间的内在联系.PHA-LEC-SCL法确立了公路隧道施工安全评价的基本模式. 相似文献
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在深入分析农村公路交通现状的基础上,结合社会主义新农村的建设,研究了社会主义新农村在公路等级及里程、客运及货物运输系统、公路养护与管理、道路交通安全防护等方面对交通的需求,提出了适应社会主义新农村建设的道路交通安全保障措施。 相似文献
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The main goal of in-vehicle technologies and co-operative services is to reduce congestion and increase traffic safety. This is achieved by alerting drivers on risky traffic conditions ahead of them and by exchanging traffic and safety related information for the particular road segment with nearby vehicles. Road capacity, level of service, safety, and air pollution are impacted to a large extent by car-following behavior of drivers. Car-following behavior is an essential component of micro-simulation models. This paper investigates the impact of an infrastructure-to-vehicle (I2V) co-operative system on drivers’ car-following behavior. Test drivers in this experiment drove an instrumented vehicle with and without the system. Collected trajectory data of the subject vehicle and the vehicle in front, as well as socio-demographic characteristics of the test drivers were used to estimate car-following models capturing their driving behavior with and without the I2V system. The results show that the co-operative system harmonized the behavior of drivers and reduced the range of acceleration and deceleration differences among them. The observed impact of the system was largest on the older group of drivers. 相似文献
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公路隧道交通安全措施探索 总被引:1,自引:0,他引:1
保障公路隧道的交通安全不仅事关隧道内司乘人员的生命安全,对隧道本身的结构安全同样有很大的影响。从公路隧道的总体设计、交通工程设施、防火、隧道内装、洞口增减光设施、火灾的预防与救援、隧道的运营管理、宣传教育和交通法规等多方面对影响公路隧道交通安全的因素和相关措施进行了探讨,旨在为公路隧道交通安全措施的研究提供一些思路。 相似文献
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我国正处于机动化发展的快速时期,机动车保有量保持逐年递增趋势,交通拥堵、交通事故及严重违反交通安全的行为不断上升,慢行交通系统的研究正在逐渐受到公众的关注。文章对慢行交通系统组成及各自特点进行阐述,研究了慢行交通设施的规划设置方法,并提出了具体设计方案,为实现城市低碳交通及城市交通可持续发展提供新思路。 相似文献