The invention provides a method for calculating a recommended value of the clear distance length between a tunnel and an intercommunication exit. The method comprises the following steps: constructing a VISSIM simulation model; respectively obtaining time headway, speed and instantaneous traffic flow density of different sections in the model, performing fitting to obtain a time headway model and a speed distribution model of different lane sections, and constructing a speed and density model and a critical insertable gap model; and constructing a safe lane changing probability model by adopting a differential method, solving the safe lane changing probability model based on a Monte Carlo simulation method according to each uncertainty factor, obtaining a target lane changing driving-out success rate under different traffic volumes, large vehicle proportions and clear distance lengths, and giving a recommended value of the clear distance length. The problem that the required clear distance value is large under the traffic capacity is calculated by adopting the idea of certainty, a reliability design method is utilized, the traffic characteristics, driver characteristics and traffic safety requirements of small-clear-distance road sections are integrated, and the calculation method of the clear distance length recommended value is provided.

    本发明提供一种隧道与互通出口净距长度推荐值的计算方法,包括以下步骤:构建VISSIM仿真模型;分别获得模型中不同断面的车头时距、速度和瞬时交通流密度,并进行拟合,获得不同车道路段的车头时距模型和速度分布模型,构建速度与密度模型、临界可插入间隙模型;采用微分法构建安全换道概率模型,根据各不确定性因素,基于蒙特卡罗仿真法对安全换道概率模型进行求解,获得不同交通量、大型车比例、净距长度下的目标换道驶出成功率,给出净距长度推荐值。本发明采用“确定性”的思想计算通行能力下所需净距值较大的问题,利用可靠度设计方法,集小净距路段的交通特性、驾驶员特性、交通安全要求为一体,提出一种净距长度推荐值的计算方法。


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    Title :

    Calculation method for recommended value of clear distance length between tunnel and intercommunication exit


    Additional title:

    一种隧道与互通出口净距长度推荐值的计算方法


    Contributors:
    LIU SHIYU (author) / LIU CHANGHE (author) / ZHANG CHI (author) / SHI HUIJUN (author) / ZHANG MIN (author) / XIE ZILONG (author) / ZHAO YIJING (author) / WANG BO (author) / XI SHENGYU (author)

    Publication date :

    2022-12-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G06K Erkennen von Daten , RECOGNITION OF DATA / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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