Overtaking Safety Evaluation and Setting of Auxiliary Lane on Two-Lane Highway in China

Abstract

Overtaking experiments on four two-lane highways were conducted. The data of overtaking conflict time (the time difference between the time of driving back to the original lane and the time of meeting with the first opposing vehicle) and experimental drivers’ risk feeling were observed. Membership was adopted to denote the experimental drivers’ risk feelings which also denote the severity of traffic conflict. Membership ranges from 0 to 1 and corresponding risk becomes higher; that is, traffic conflict becomes more serious. According to the observed relationship between overtaking conflict time, and drivers’ risk feeling membership, Cauchy distribution function was adopted as membership function. The thresholds of the severity of traffic conflict were determined through Delphi method. The relationship model among traffic volume, overtaking conflict time and design speed was established according to experimental data. Then the idea of setting auxiliary lane on two-lane highway in China was presented. And the traffic volume values that need setting auxiliary lane corresponding to different design speed and traffic conflict degree were given according to the established model. It is expected to improve the traffic safety level of two-lane highway in China through setting auxiliary lane.

A Hybrid Planning Approach Based on MPC and Parametric Curves for Overtaking Maneuvers

“…Some authors have studied overtaking maneuvers as a three-phase movement: (i) departing from the original lane, (ii) cruising in the opposite lane to overtake the other vehicle, and (iii) returning to the original lane [ 20 , 21 , 22 ]. In this three-phase approach, space and time gaps are temporally blocked for the maneuver execution with other moving vehicles; these gaps are proven to be of difficult calculation for vehicle automation [ 23 , 24 ] and the other vehicles could not understand the blockage of the space for cooperative maneuvers.…”

Minimum time overtaking problem of vehicle handling inverse dynamics based on interval mathematics

“…Since the collocation points of Gauss pseudospectral method are all distributed in interval [21,1], the time interval of the optimal control problem should be converted into ½À1, 1. Transform the time variable t: t = 2t=(t e À t 0 )À (t e + t 0 )=(t e À t 0 ).…”

“…The most common types of traffic accidents are rear-end collision and side impact during overtaking, which is one of the most frequent driving behaviors of drivers. 1 According to statistics, the drivers will have about 50 times overtaking behaviors when driving 100 km at 90 km/h on the expressway. 2 In recent years, more than 60% traffic accidents are related to improper overtaking behaviors especially on the expressway.…”

Spacing and geometric design indexes of auxiliary lanes on two-lane highway in China

“…According to the literature of Cheng et al, 18 the boundary values between general and serious conflicts were taken as the thresholds of traffic volumes that ought to set auxiliary lanes. In addition, the traffic volume should be less than design capacity.…”

“…In China, the research on the passing lanes on twolane highways is rare. Cheng et al 18 studied the traffic conditions of the setting of auxiliary lanes on two-lane highway. Benefit assessments and design elements of auxiliary lanes are urgent to study in China so as to support the revision of ''Technical Standard of Highway Engineering (JTG B01-2014)'' and ''Design Specification for Highway Alignment (JTG D20-2006)'' and to provide references for departments of highway planning, design, construction, and management.…”