Evaluating the Impact of Sight Distance and Geometric Alignment on Driver Performance in Freeway Exits Diverging Area Based on Simulated Driving Data

Zhou, Xizhen; Pan, Binghong; Shao, Yang

doi:10.3390/su13116368

Cited by 7 publications

(3 citation statements)

References 52 publications

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“…Configuration 1 is the original U-turn design, where vehicles complete a U-turn before the stop line for the intersection The prerequisite for accurately replicating real traffic conditions using VISSIM simulation software requires the input of specific parameters. Based on the driving habits of Chinese drivers and in connection with available research [49][50][51][52], some of these parameters are specified as follows:…”

Section: Preparation For Establishing the Vissim Modelmentioning

confidence: 99%

The Impact of Parallel U-Turns on Urban Intersection: Evidence from Chinese Cities

Shi,

Tian,

et al. 2023

Sustainability

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As the number of motor vehicles in China’s cities continues to increase, the imbalance between the capacity that existing urban roads have for construction and the demand for motor vehicles is becoming increasingly evident. Indeed, the design of the intersection U-turn scheme has garnered significant attention from researchers. However, as the number of vehicles requiring U-turns increases, the traditional U-turn in the median or U-turn at the intersection fails to meet the timely demand for U-turns. In such cases, vehicles needing to make U-turns are required to queue first. As the queue length grows, it ultimately impacts the operational efficiency of the intersection. To optimize the imbalance between supply and demand at these intersections and promote the sustainable development of intersections, an innovative form of U-turn organization called the Parallel U-turn has been developed. In the engineering practice of reconstructing existing intersections or constructing new ones, it is crucial to investigate the compatibility between various U-turn design forms and traffic volumes. This exploration helps ensure that the chosen U-turn design effectively accommodates the specific traffic demands at the intersection. Therefore, in this paper, a typical intersection in Xi’an was chosen as the study intersection to investigate traffic data. The researchers calibrated and simulated four U-turn organization schemes using VISSIM microsimulation software. The four schemes included a traditional U-turn at the intersection, a Parallel U-turn at the intersection, a traditional U-turn in the median, and a Parallel U-turn in the median. Then, the researchers used the entropy-weighted TOPSIS method (EWTM) to evaluate the compatibility of each U-turn organization scheme for different traffic combinations. This assessment was conducted based on three criteria: operational efficiency, environmental protection, and safety performance. The results of this study indicate that the Parallel U-turn design is advantageous for the XiaoZhai intersection in Xi’an, China, under specific traffic conditions. When the traffic volume at the intersection exceeds 5940 vehicles per hour but remains below the intersection’s maximum capacity, implementing the Parallel U-turn design could yield positive outcomes in terms of operational efficiency, safety performance, and a reduction in intersection pollution. In summary, by enhancing operational efficiency, safety, and environmental impact, the Parallel U-turn design promotes the overall performance and sustainability of the XiaoZhai intersection and the transportation system in Xi’an, China.

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Section: Preparation For Establishing the Vissim Modelmentioning

confidence: 99%

The Impact of Parallel U-Turns on Urban Intersection: Evidence from Chinese Cities

Shi,

Tian,

et al. 2023

Sustainability

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“…Under general conditions, diverging areas of expressways have been considered as the capacity bottlenecks of sections [ 1 ]. Drivers expecting to diverge need to recognize the exit through signs or markings and consequently change to the curb lane within a limited period and distance [ 2 , 3 ]. Studies also show that diversion at exits can significantly increase driver workload and errors [ 4 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 shows the coverage of TECS on TEAS. This paper defines TECS as the section from the tunnel exit to the start of the taper, since drivers are always expected to be fully prepared for diverging before the taper [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Design Method for Highway Adjacent Tunnel and Exit Connection Section Length Based on Entropy Method

Liu

Pan

Zhang

et al. 2022

Entropy

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With the continuous construction of transportation infrastructure, intersection nodes have been increasing rapidly, bringing growing numbers of tunnel- and exit-adjacent sections (TEAS) in mountain expressways in China. With the complex variation in the surrounding environment, drivers always face congestion and confusion on tunnel and the exit connecting sections (TECS) without adequate length, meanwhile excessively long TECS create detours. To better provide a sustainable design strategy for TEAS, based on a certain section of expressway in Shaanxi, China, this paper establishes a theoretical calculation model through analysis. The characteristics of traffic flow and drivers’ light adaptation at tunnel exit are obtained through data collection and driving tests, and the length requirements of the tunnel and exit connecting sections (TECS) are discussed. A VISSIM microscopic simulation model is also built under various design schemes and entropy-based multi-attribute decision making (EBMADM) is used to objectively calculate the weights of the four selected evaluation indexes. Then, the design schemes of the TECS with different lengths have been comprehensively evaluated. The results show the match between the evaluation results of EBMADM with theoretical calculations under existing traffic conditions, which proves the rationality of EBMADM in such problems. For more cases, the results of the EBMADM evaluation show a positive correlation between the length of TECS for the best performing design scheme with traffic volume and diverging ratio.

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What Causes Curbside Illegal Parking Behavior: A Method Based on Structural Equation Model

Yan

Zhou

2023

KSCE Journal of Civil Engineering

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Evaluating the Impact of Sight Distance and Geometric Alignment on Driver Performance in Freeway Exits Diverging Area Based on Simulated Driving Data

Cited by 7 publications

References 52 publications

The Impact of Parallel U-Turns on Urban Intersection: Evidence from Chinese Cities

The Impact of Parallel U-Turns on Urban Intersection: Evidence from Chinese Cities

Evaluation of Design Method for Highway Adjacent Tunnel and Exit Connection Section Length Based on Entropy Method

What Causes Curbside Illegal Parking Behavior: A Method Based on Structural Equation Model

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