Effects of edge rate of the designed line markings on the following time headway

Abstract

Abstract. Time headway is an important indicator for evaluating car-following safety.To study the in uence of edge rate on time headway in car-following, three patterns of line marking were designed and placed on a real-world expressway, with actual vehicle ow data collected. Statistical analyses showed that (1) Time headways raised after the installation of line markings compared with the original situation; and (2) When the value of edge rate fell in [5 Hz,14 Hz], the time headway rose along the increase in the edge rate. Furthermore, the increases in time headways were interpreted in relation with the leveling up of the drivers' risk perception due to its overestimation in speed and underestimation in distance caused by edge rate. The nding of this study suggests that the designed line markings may bene t engineers and decision makers in providing them with a new approach to cope with critical issues in tra c safety.

Rear-End Crash Risk Analysis considering Drivers’ Visual Perception and Traffic Flow Uncertainty: A Hierarchical Hybrid Bayesian Network Approach

“…Actually, the influence of visual perception on driving behaviors and collision avoidance was originally noticed by some cognitive psychologists, who verified in virtual-reality scenes that the existence of certain visual information (which was termed as "visual cues") on ground surface could lead to drivers' overestimation of speed [42,44,48,62,63], underestimation of distance [44,[64][65][66][67][68][69][70], and untimely and inadequate brake [42,43]. Inspired by those cognitive psychologists, Ding et al [14,21,24,71,72] conducted a series of studies focusing on associating, evaluating, and explaining the effects and mechanism of drivers' speed perception and distance perception on car-following behaviors and crash risk, by introducing and testing several specially designed perceptual markings with on-road experiments and observations. In addition, the inherent connection between speed/distance perception, driving behaviors, and crash risk was comprehensively accounted for by two latent variables, i.e., "speed risk perception (SRP)" and "distance risk perception (DRP)," which differentiated the risk perception originating from variations in speed and distance [14].…”

“…Generally, most of the experimental sites, designs, and processes of data collection and data treatment had already been demonstrated in previous studies [14,71,72], which will be briefly mentioned here. erefore, the variable selection and description are of primary focus to be explained in this study.…”

“…It is important to mention here that there was no tunnel, entrance/exit, or any signs within 300 m area that could possibly impact driver behaviors, nor any exposed surveillance device for violation capture. e design of the perceptual markings, as introduced in Ding et al [14,71,72], was also followed in the present study. at is, three forms of perceptual markings were adopted, which were specified by the units of the perceptual markings, i.e., λ � 2 m, λ � 4 m, and λ � 8 m (see Figure 2).…”

Influence Mechanism of Visual Perception of Edge Rate Lines Cycle Length on Driver’s Speed

“…Liu et al (2013) studied the influence of the plane layout of the edge rate lines on the speed reduction effect, and found that the double-row edge rate lines had better speed reduction effect. Furthermore, through road experiments, Ding et al (2017aDing et al ( , 2017bDing et al ( , 2019 found that edge rate marking can not only reduce the speed, but also increase the headway time, the cycle length of edge rate lines selected by the experiment were 2 m.…”