Lane by lane analysis of vehicle time headways — Case study of Izmir ring roads in Turkey

Yiğiter, Özlem Ceyhan; Tanyel, Serhan

doi:10.1007/s12205-014-0267-y

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…From a microscopic point of view, the lane changing of the vehicle is affected by the insertable clearance in the target lane [ 53 ]. Research shows that the time headway distribution of the vehicle in the mainline can obey the K-order Erlang distribution [ 54 ], negative exponential distribution [ 55 ], Cowan M3 distribution [ 56 ], or GEV distribution [ 57 ]. Through SPSS data analysis, the measured data are used to fit these models, and it can be concluded that the time headway of the research target road section approximately obeys the third-order Erlang distribution.…”

Section: Model Development Of Theoretical Calculationmentioning

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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Section: Model Development Of Theoretical Calculationmentioning

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

View full text Add to dashboard Cite

show abstract

“…distribution are predicted by using least square method. can be calculated by the following equation [27]:…”

Section: Calculate the Ratio Of Free Flow The Parameters Of M3mentioning

confidence: 99%

Review of Roundabout Capacity Based on Gap Acceptance

Ren

Liu

Wang

2019

Journal of Advanced Transportation

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Circulating vehicles have priority at modern roundabouts. Entrance vehicles can enter the roundabout when there is a time gap larger than the critical gap; otherwise, the vehicles need to wait until there is a large enough gap. The gap acceptance theory was used to analyze the entrance capacity of roundabouts, which can be derived by queuing theory involving two vehicle streams. The paper introduces the main styles of headway distribution, which are named as bunched exponential distribution or M3 distribution. The calculation model of free stream ratio is also introduced. The entrance capacity models can be classified by different entrance vehicle types, which are piecewise function or linear function, or by different critical gap types, which are constant or stochastic function. For each form, the typical capacity expressions are given. The calculation values show a very small difference between these kinds of models. The capacity value based on the critical gap of stochastic function is more realistic and more complex in function style. Some conclusions were derived that drivers’ nonhomogeneous and inconsistent character is more realistic than the fixed critical gap and following gap. The calculation results of capacity are similar to the field capacity under the assumption of homogeneity and continuance, with only a minor percent deviation. Finally, the paper points out additional problems and the suggested research in capacity of roundabouts.

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Assessing performance of collision mitigation brake system in Chinese traffic environment

Zhao

Zheng

Wang

et al. 2019

J. Cent. South Univ.

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Lane by lane analysis of vehicle time headways — Case study of Izmir ring roads in Turkey

Cited by 5 publications

References 17 publications

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

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

Review of Roundabout Capacity Based on Gap Acceptance

Assessing performance of collision mitigation brake system in Chinese traffic environment

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