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Prof. Dr. Binghong Pan
Highway Academy, Chang'an University

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Research Keywords & Expertise

0 Traffic Safety
0 Highway Engineering
0 road design
0 traffc flow
0 interchange design

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Short Biography

Binghong Pan was born in Wuhan, Hubei Province, China in 1974. He received the B.S. degree, the M.S. degree, and the Ph.D. degree in transportation engineering from Chang’an University, Xi’an, Shaanxi, China, in 1996, 1999, and 2008, respectively. He is currently an Associate Professor of Highway Academy in Chang’an University, Xi’an. His research focuses on highway engineering, interchange design and traffic safety. Prof. Pan was a recipient of the 2013 Science and Technology Award from China Highway and Transportation Association.

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Journal article
Published: 19 June 2021 in Sustainability
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As an unconventional design to alleviate the conflict between left-turn and through vehicles, Continuous Flow Intersection (CFI) has obvious advantages in improving the sustainability of roadway. So far, the design manuals and guidelines for CFI are not enough sufficient, especially for the displaced left-turn lane length of CFI. And the results of existing research studies are not operational, making it difficult to put CFI into application. To address this issue, this paper presents a methodological procedure for determination and evaluation of displaced left-turn lane length based on the entropy method considering multiple performance measures for sustainable transportation, including traffic efficiency index, environment effect index and fuel consumption. VISSIM and the surrogate safety assessment model (SSAM) were used to simulate the operational and safety performance of CFI. The multi-attribute decision-making method (MADM) based on an entropy method was adopted to determine the suitability of the CFI schemes under different traffic demand patterns. Finally, the procedure was applied to a typical congested intersection of the arterial road with heavy traffic volume and high left-turn ratio in Xi’an, China, the results showed the methodological procedure is reasonable and practical. According to the results, for the studied intersection, when the Volume-to-Capacity ratio (V/C) in the westbound and eastbound lanes is less than 0.5, the length of the displaced left-turn lanes can be selected in the range of 80 to 170 m. Otherwise, other solutions should be considered to improve the traffic efficiency. The simulation results of the case showed CFI can significantly improve the traffic efficiency. In the best case, compared with the conventional intersection, the number of vehicles increases by 13%, delay, travel time, number of stops, CO emission, and fuel consumption decrease by 41%, 29%, 25%, 17%, and 17%, respectively.

ACS Style

BingHong Pan; Shasha Luo; Jinfeng Ying; Yang Shao; Shangru Liu; Xiang Li; Jiaqi Lei. Evaluation and Analysis of CFI Schemes with Different Length of Displaced Left-Turn Lanes with Entropy Method. Sustainability 2021, 13, 6917 .

AMA Style

BingHong Pan, Shasha Luo, Jinfeng Ying, Yang Shao, Shangru Liu, Xiang Li, Jiaqi Lei. Evaluation and Analysis of CFI Schemes with Different Length of Displaced Left-Turn Lanes with Entropy Method. Sustainability. 2021; 13 (12):6917.

Chicago/Turabian Style

BingHong Pan; Shasha Luo; Jinfeng Ying; Yang Shao; Shangru Liu; Xiang Li; Jiaqi Lei. 2021. "Evaluation and Analysis of CFI Schemes with Different Length of Displaced Left-Turn Lanes with Entropy Method." Sustainability 13, no. 12: 6917.

Journal article
Published: 03 June 2021 in Sustainability
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The decision sight distance (DSD) at freeway exits is a major factor affecting traffic safety. Based on the Hechizhai Interchange in Xi’an City (Shaanxi Province, China), this paper designs a simulation experiment. Through a simulator study and a questionnaire survey, this paper discusses the impact of the DSD, 1.25 times the stopping sight distance (SSD) and a circular curve deflection on a driver’s driving state (including steering wheel angle rate and steering wheel angle frequency domain). Thirty volunteers participated in this research. The result shows that (1) it is safer to drive on an exit that meets DSD. (2) If it only meets the 1.25 times the SSD requirement, the overloaded driving tasks and operation would be more likely to cause crashes. The driving state of the driver on the right circular curve is obviously better than that on the left circular curve, because changing lanes to the right on the left circular curve does not meet the driver’s expectations. (3) Left and right circular curve should be treated differently in the driving area and the constant sight distance requirements should not be applied. (4) The left circular curve should be more stringent to ensure driving safety.

ACS Style

Xizhen Zhou; BingHong Pan; Yang Shao. Evaluating the Impact of Sight Distance and Geometric Alignment on Driver Performance in Freeway Exits Diverging Area Based on Simulated Driving Data. Sustainability 2021, 13, 6368 .

AMA Style

Xizhen Zhou, BingHong Pan, Yang Shao. Evaluating the Impact of Sight Distance and Geometric Alignment on Driver Performance in Freeway Exits Diverging Area Based on Simulated Driving Data. Sustainability. 2021; 13 (11):6368.

Chicago/Turabian Style

Xizhen Zhou; BingHong Pan; Yang Shao. 2021. "Evaluating the Impact of Sight Distance and Geometric Alignment on Driver Performance in Freeway Exits Diverging Area Based on Simulated Driving Data." Sustainability 13, no. 11: 6368.

Surveying and geo spatial engineering
Published: 23 April 2021 in KSCE Journal of Civil Engineering
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Because of the singular form and low flexibility of the clothoid as a highway transition curve in highway horizontal alignment, the K-curve, whose ratio of the chord-tangent angle to the tangential angle at any point is fixed, was proposed in a previous work, including the corresponding parametric equations and basic characteristics, and its high flexibility and various shapes were proved. Here, the application and verification of the K-curve in highway alignment is further studied. The solution methods of the K-curve for different connections are given. Through theoretical calculations and specific real-world examples, the geometric positions and lateral forces of the K-curve and the clothoid under different connection conditions are compared. The results show that the difference between the K-curve and clothoid in the above two aspects under a straight line-to-circle connection is greater than that under a circle-to-circle connection as an egg curve, and although the lateral force coefficient of the K-curve is smaller than that of the clothoid, the K-curve suffers from rapid change in the lateral force coefficient and a higher lateral acceleration change rate. Finally, the application conditions of the K-curve for highway alignment design are given with consideration of the centrifugal acceleration change rate.

ACS Style

Bing-Hong Pan; Changpeng Wen; Kaiming Wang; Changjiang Liu; Linqi Chen. Solution Method and Application Verification of the K-curve as a Highway Transition Curve. KSCE Journal of Civil Engineering 2021, 25, 2690 -2700.

AMA Style

Bing-Hong Pan, Changpeng Wen, Kaiming Wang, Changjiang Liu, Linqi Chen. Solution Method and Application Verification of the K-curve as a Highway Transition Curve. KSCE Journal of Civil Engineering. 2021; 25 (7):2690-2700.

Chicago/Turabian Style

Bing-Hong Pan; Changpeng Wen; Kaiming Wang; Changjiang Liu; Linqi Chen. 2021. "Solution Method and Application Verification of the K-curve as a Highway Transition Curve." KSCE Journal of Civil Engineering 25, no. 7: 2690-2700.

Journal article
Published: 07 April 2021 in Sustainability
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Conventional four-legged intersections are inefficient under heavy traffic requirements and are prone to congestion problems. Unconventional intersections with innovative designs allow for more efficient traffic operations and can increase the capacity of the intersection, in some cases. Common unconventional designs for four-legged intersections include the upstream signalized crossover intersection (USC), continuous flow intersection (CFI), and parallel flow intersection (PFI). At present, an increasing number of cities are using such unconventional designs to improve the performance of their intersections. In the reconstruction of original intersections or the design of new intersections, the question of how to more reasonably select the form of unconventional intersection becomes particularly critical. Therefore, we selected a typical intersection in Xi’an for optimization and investigated traffic data for this intersection. The traffic operations, with respect to the four solutions of a conventional intersection, USC, CFI, and PFI, were evaluated using the VISSIM software. Then, we evaluated the suitability of each solution under different situations using the CRITIC (CRiteria Importance Through Intercriteria Correlation) method, which is a multi-criteria decision-making (MCDM) method that enables a more comprehensive and integrated evaluation of the four solutions by taking into account the comparative intensities and conflicting character among the indices. The results show that the conventional intersection is only applicable to the case of very low traffic volume; PFI has the advantage in the case of moderate and high traffic volume; CFI performs better in the case of high traffic volume; and USC is generally inferior to CFI and PFI, although it has greater improvement, compared with the conventional solution, in a few cases.

ACS Style

BingHong Pan; Shangru Liu; Zhenjiang Xie; Yang Shao; Xiang Li; Ruicheng Ge. Evaluating Operational Features of Three Unconventional Intersections under Heavy Traffic Based on CRITIC Method. Sustainability 2021, 13, 4098 .

AMA Style

BingHong Pan, Shangru Liu, Zhenjiang Xie, Yang Shao, Xiang Li, Ruicheng Ge. Evaluating Operational Features of Three Unconventional Intersections under Heavy Traffic Based on CRITIC Method. Sustainability. 2021; 13 (8):4098.

Chicago/Turabian Style

BingHong Pan; Shangru Liu; Zhenjiang Xie; Yang Shao; Xiang Li; Ruicheng Ge. 2021. "Evaluating Operational Features of Three Unconventional Intersections under Heavy Traffic Based on CRITIC Method." Sustainability 13, no. 8: 4098.

Journal article
Published: 01 April 2021 in IEEE Access
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The interchange diverging area is a bottleneck section of the freeway. If the capacity of a two-lane exit cannot meet the traffic demand, it will lead to a reduction in the overall operational efficiency of the freeway. To fundamentally improve the capacity of the diverging area, designers have considered expanding the two-lane exit to a three-lane exit. However, the existing Chinese design specifications do not include a design for a three-lane exit, and the method of increasing the number of ramp lanes by setting up auxiliary lanes according to traditional design concepts leads to the mainline widening section being too long, thus increasing the construction land use and project cost. Therefore, this paper proposes an innovative three-lane exit design based on a specific two-lane exit at an interchange in Xi’an. According to the different traffic organization methods, three microscopic simulation models of diverging areas were constructed by using VISSIM. The entropy method was used to objectively calculate the weights of the four selected evaluation indexes, and a comprehensive evaluation and applicability analysis of the current situation and the three-lane exit design schemes were conducted. The results show that the optimal combination of the schemes calculated by the entropy method increases the traffic volume by up to 40% and reduces delays by 50-88%.

ACS Style

BingHong Pan; Zhenjiang Xie; Shangru Liu; Yang Shao; Junjie Cai. Evaluating Designs of a Three-Lane Exit Ramp Based on the Entropy Method. IEEE Access 2021, 9, 53436 -53451.

AMA Style

BingHong Pan, Zhenjiang Xie, Shangru Liu, Yang Shao, Junjie Cai. Evaluating Designs of a Three-Lane Exit Ramp Based on the Entropy Method. IEEE Access. 2021; 9 (99):53436-53451.

Chicago/Turabian Style

BingHong Pan; Zhenjiang Xie; Shangru Liu; Yang Shao; Junjie Cai. 2021. "Evaluating Designs of a Three-Lane Exit Ramp Based on the Entropy Method." IEEE Access 9, no. 99: 53436-53451.