[1]潘兵宏,李翔.高速公路小客车专用单车道加速车道最小长度[J].长安大学学报(自然科学版),2021,41(5):107-117.
 PAN Bing hong,LI Xiang.Minimum length of passengercaronlyacceleration single lane of highway[J].Journal of Chang’an University (Natural Science Edition),2021,41(5):107-117.
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高速公路小客车专用单车道加速车道最小长度()
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长安大学学报(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
第41卷
期数:
2021年5期
页码:
107-117
栏目:
交通工程
出版日期:
2021-09-15

文章信息/Info

Title:
Minimum length of passengercaronlyacceleration single lane of highway
作者:
潘兵宏李翔
(长安大学 公路学院,陕西 西安 710064)
Author(s):
PAN Binghong LI Xiang
(School of Highway, Changan University, Xian 710064, Shaanxi, China)
关键词:
交通工程加速车道最小长度长度建模设计小客车专用单车道加速车道客货分离匝道
Keywords:
traffic engineering minimum length of acceleration lanecalculation model of length POASL SPCT ramp
文献标志码:
A
摘要:
为了填补客货分离式互通立体交叉设计上的空白,提供相关设计的理论支持,以小客车车辆行驶特征为基础,研究客货分离高速公路小客车专用单车道加速车道的最小长度。首先,在分析主线和匝道设计速度、小客车加速性能等因素对加速段长度影响以及汇入交通流车头时距特征、主线设计通行能力、车头时距最小值等对等待段长度影响的基础上,建立了小客车专用加速车道的加速段、等待段和三角渐变段长度计算模型。其次,通过分析国内外规范中合理的小客车特征速度、加速度等参数,确定小客车专用单车道加速车道最小长度计算模型中的关键指标,通过计算提出了单车道小客车专用匝道加速车道最小长度建议值。最后,分析不同纵坡坡度对小客车合流的影响,提出了上坡加速段纵坡坡度修正系数。研究结果表明:中国规范规定的加速车道最小长度值仅满足匝道设计速度大于或等于50 km/h时的长度要求,当匝道设计速度小于50 km/h时,规范规定值无法满足小客车安全汇流的要求,宜适当提高规范规定的最小长度;当加速车道位于上坡时,只需要对加速车道加速段的最小长度进行修正即可,不需要对整个加速车道长度进行修正;平行式加速车道较直接式加速车道三角渐变段更短,且随设计速度的提高,二者之差逐渐增大;从占地角度考虑,平行式加速车道更适用于小客车专用单车道加速车道。
Abstract:
In order to fill the gap in the design of the separation of passenger cars and trucks (SPCT) interchange, and to provide the theoretical support for the relevant design, the minimum length of passengercaronlyacceleration single lane (POASL) on freeway was studied based on the driving characteristics of passenger cars. First of all, by analyzing effect of the design speed of main lane and ramp, acceleration performance of passenger cars on the acceleration zone, and the effect of the characteristics of time headway of inflow traffic flow, design traffic capacity of main line and minimum headway on the waiting zone, the length calculation model of acceleration zone, waiting zone and triangle gradient section were established. Secondly, by selecting the reasonable speed and acceleration characteristic parameters of the passenger cars in the domestic and foreign codes, the key indexes in the calculation model were determined, and the recommended minimum length of the POASL was put forward through calculation. Finally, the influence of different longitudinal slopes on the confluence of passenger cars was analyzed, and the longitudinal slope correction coefficient of the acceleration zone was proposed. The results show that the minimum length of the acceleration lane specified in Chinese code merely meets the requirements of the design speed of the ramp is greater than or equal to 50 km/h. If the design speed of ramp is less than 50 km/h, the standard value is too short to meet the requirements of safe confluence. Therefore, it is appropriate to increase the minimum length of acceleration specified in code appropriately. When an acceleration lane is located uphill, only the minimum length of the acceleration zone needs to be corrected, rather than the entire length of acceleration lane. The parallel acceleration lane is shorter than the directlylinked type acceleration lane, and the difference between them increases with the enlargement of design speed. Considering occupation, the parallel acceleration lane is more economical for POASL. 9 tabs, 8 figs, 28 refs.

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更新日期/Last Update: 2021-09-30