Understanding the traffic flow in different types of freeway tunnels based on car-following behaviors analysis

Shang, Ting; Lu, Jiaxin; Luo, Ying; Wang, Song; He, Zhengyu; Wang, Aobo

doi:10.1016/j.tust.2023.105494

Tunnelling and Underground Space Technology

2024

DOI: 10.1016/j.tust.2023.105494

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Understanding the traffic flow in different types of freeway tunnels based on car-following behaviors analysis

Ting Shang,

Jiaxin Lu,

Ying Luo

et al.

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Cited by 3 publications

References 34 publications

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Effect of interfacial characteristics on dynamic splitting behavior of quasi rock-concrete composite layer: Towards resilient tunnel support against rock burst

Zhang,

Wang,

Chen

et al. 2025

Tunnelling and Underground Space Technology

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Effect of interfacial characteristics on dynamic splitting behavior of quasi rock-concrete composite layer: Towards resilient tunnel support against rock burst

Zhang,

Wang,

Chen

et al. 2025

Tunnelling and Underground Space Technology

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Impact of access point density on driving safety in underground loops: Examining drivers’ operational performance and visual characteristics

Zhang,

Chen,

Song

et al. 2024

Journal of Transportation Safety & Security

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Efficient Mako Shark-Inspired Aerodynamic Design for Concept Car Bodies in Underground Road Tunnel Conditions

Venegas,

Oñate,

Pierart

et al. 2024

Biomimetics

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The automotive industry continuously enhances vehicle design to meet the growing demand for more efficient vehicles. Computational design and numerical simulation are essential tools for developing concept cars with lower carbon emissions and reduced costs. Underground roads are proposed as an attractive alternative for reducing surface congestion, improving traffic flow, reducing travel times and minimizing noise pollution in urban areas, creating a quieter and more livable environment for residents. In this context, a concept car body design for underground tunnels was proposed, inspired by the mako shark shape due to its exceptional operational kinetic qualities. The proposed biomimetic-based method using computational fluid dynamics for engineering design includes an iterative process and car body optimization in terms of lift and drag performance. A mesh sensitivity and convergence analysis was performed in order to ensure the reliability of numerical results. The unique surface shape of the shark enabled remarkable aerodynamic performance for the concept car, achieving a drag coefficient value of 0.28. The addition of an aerodynamic diffuser improved downforce by reducing 58% of the lift coefficient to a final value of 0.02. Benchmark validation was carried out using reported results from sources available in the literature. The proposed biomimetic design process based on computational fluid modeling reduces the time and resources required to create new concept car models. This approach helps to achieve efficient automotive solutions with low aerodynamic drag for a low-carbon future.

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Understanding the traffic flow in different types of freeway tunnels based on car-following behaviors analysis

Cited by 3 publications

References 34 publications

Effect of interfacial characteristics on dynamic splitting behavior of quasi rock-concrete composite layer: Towards resilient tunnel support against rock burst

Effect of interfacial characteristics on dynamic splitting behavior of quasi rock-concrete composite layer: Towards resilient tunnel support against rock burst

Impact of access point density on driving safety in underground loops: Examining drivers’ operational performance and visual characteristics

Efficient Mako Shark-Inspired Aerodynamic Design for Concept Car Bodies in Underground Road Tunnel Conditions

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