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

Liu, Yutong; Pan, Binghong; Zhang, Zelong; Zhang, Ranyang; Shao, Yang

doi:10.3390/e24121794

Cited by 8 publications

(6 citation statements)

References 58 publications

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“…Some scholars have given ramp spacing recommendations for two different ramp combinations: "entrance-exit" and "exit-exit" [31]. Through theoretical derivation and simulation, Liu proposed the spacing between tunnel exits and interchange exits according to varying traffic volumes and diverging rates and comprehensively evaluated the traffic efficiency and pollutant emissions of different schemes based on entropy [32]. Based on a data envelopment analysis combined with a hierarchical analysis, the optimal spacing is proposed for the four ramp combination types of exit and entrance [33].…”

Section: Small Spacing Interchange Improvement Methodsmentioning

confidence: 99%

Research on Efficient Operation for Compound Interchange in China from an Auxiliary Lanes Configuration Aspect

Tian,

Shi,

Yang

et al. 2023

Applied Sciences

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Interchanges are the key nodes of the freeway. Due to the existence of weaving behavior, the traffic flow situation is more complicated for small spacing interchanges. Continuous auxiliary lanes are usually used to connect the entrance and exit to form a compound interchange to reduce the interference of weaving behavior. However, when it comes to the design of auxiliary lane forms, China lacks relevant design specifications and research in this area. As a result, there often exists the phenomenon of mismatch between the design form and the traffic volume. In this paper, we took a compound interchange in Xi’an as the research object, proposing four auxiliary lane design schemes and using VISSIM (2022 student) software to establish the simulation model. Additionally, various traffic conditions were simulated through sensitivity analysis. Finally, using the factor analysis method and entropy method, we comprehensively assigned weights to the indexes. By obtaining the weighted scores for various schemes, it became possible to determine the applicability of each scheme under different traffic conditions. The results indicate that the gradient auxiliary lane can be applied to most traffic conditions and has a smaller land occupation than the traditional design, which is an optimization and improvement for the traditional design form.

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Section: Small Spacing Interchange Improvement Methodsmentioning

confidence: 99%

Research on Efficient Operation for Compound Interchange in China from an Auxiliary Lanes Configuration Aspect

Tian,

Shi,

Yang

et al. 2023

Applied Sciences

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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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“…In the field of transportation, numerous studies have shown the reliable, effective, and economic advantages of using VISSIM numerical simulation [25,26]. To ensure reliability and realism, it is essential to incorporate real traffic data in the development of the simulation model and the calibration of parameters to recreate specific traffic scenarios [27]. Furthermore, benefiting from the emergence of target detection algorithms, the use of unmanned aerial vehicles (UAV) in data measurement can achieve better efficiency compared to conventional radar measurements [28].…”

Section: Introductionmentioning

confidence: 99%

“…The core of the CE method, which aims to assign weights to indicators with different amounts of information, has been successfully applied in various fields, including economics [32], medicine [33], environment [34], and transportation [27]. Among those, the entropy method, which determines the weights based on the variability of indicators, is the most frequently used type of method [35].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Performance of Multilane Expressway Exit Design and a Traffic Organization Strategy Based on VISSIM Micro-Simulation and a Comprehensive Evaluation Method

2023

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Frequent consecutive lane changes and the barrier effect produced by trucks can always contribute to rapid access to the capacity bottleneck at expressway exits, thereby reducing operational performance. This paper proposes to retrofit the conventional interchange design to reduce lane changes and compares them with conventional design and passenger vehicle and truck separation (PVTS) design from multiple fields via VISSIM numerical simulation, which is developed and calibrated with traffic data collected on the eight-lane expressway in China at four levels of service (LOS). Comprehensive evaluation (CE) results reveal that the PVTS strategy improves operational performance by 10–20% at multilane expressway exits, while lane separation around interchanges also yields a similar gain. However, ramps on both the left and right sides show less effective improvement and are even negative at LOS-A and LOS-B. All PVTS and improved designs produce a better comprehensive improvement ratio with a LOS decrease, and improved designs achieve optimal performance below LOS-B with construction cost taken into consideration.

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

Cited by 8 publications

References 58 publications

Research on Efficient Operation for Compound Interchange in China from an Auxiliary Lanes Configuration Aspect

Research on Efficient Operation for Compound Interchange in China from an Auxiliary Lanes Configuration Aspect

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

Understanding the Performance of Multilane Expressway Exit Design and a Traffic Organization Strategy Based on VISSIM Micro-Simulation and a Comprehensive Evaluation Method

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