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。
Calculation method for recommended value of clear distance length between tunnel and intercommunication exit
一种隧道与互通出口净距长度推荐值的计算方法
2022-12-09
Patent
Electronic Resource
Chinese
European Patent Office | 2022
|Vehicular Intercommunication System
NTIS | 1979
|Vehicular Intercommunication System
NTIS | 1978
|Vehicular Intercommunication System
NTIS | 1978
|