Modeling of Elementary and Actual Speed Distributions for Traffic Flow

Tamura, Youichi; Chisyaki, Takeshi; Mino, Sadamu

doi:10.2208/jscej.1987.127

Cited by 3 publications

(5 citation statements)

References 3 publications

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“…This paper presents a computational procedure that allows for evaluating the average percentage of vehicles free to travel at the desired speed and of non-free vehicles constrained to travel at lower speeds than desired as a function of the traffic flow on a two-lane road. The TLR-SPM constitutes an improvement of a method in literature by [27,32], with a more general approach deriving from the removal of the assumptions of normal distribution of the actual speeds and constancy of the means and variances of the same, relating to the variable time headways.…”

Section: Discussionmentioning

confidence: 99%

“…• Allows us to overcome the approach that we find in a part of the technical literature, which sets a deterministic headway threshold for the distinction between free and non-free vehicles; • Decouples analyses from the specification of certain probabilistic distributions for the headways and the estimation of the related parameters that we can find in research works more focused on the probabilistic modeling aspects; • Constitutes an improvement of a method in the literature by [27,32], with a more general approach deriving from the removal of the assumptions of the normal distribution of the actual speeds and constancy of the means and variances of the same;…”

Section: Discussionmentioning

confidence: 99%

Section: The Two-lane Road Statistical Platooning Modelmentioning

confidence: 98%

“…Contrary to what was mentioned above for the models by [23,27,32], the approach explored in this paper does not need to hypothesize, identify, and estimate the probability laws for speeds and time headways. In fact, the in-depth analyses presented below constitute a generalization of what has already been proposed by [27,32], removing the assumptions of the normal distribution of the actual speeds and constancy of the means and variances of the same, relating to the values assumed by the time headways. In this way, compared to the situations discussed above, the Two-Lane Road Statistical Platooning Model (TLR-SPM) proposed here can achieve greater adaptability to experimental data, as it is not based on a priori assumptions, but on behaviors that emerge statistically from real data, and which are interpreted with a data-driven approach.…”

Section: The Two-lane Road Statistical Platooning Modelmentioning

confidence: 98%

“…Chishaki and Tamura [27] propose a method for the classification of vehicular influence situations to specify a mixed-type headway distribution model. This model [27,32] also allows us to analyze the influences that traffic fluctuations have on the distribution of time headways, considering a normal distribution for vehicle speeds, with variable means and variances for vehicles that travel free and not free from influences of the previous vehicle, but with constant values as the time headway varies. Catbagan and Nakamura [23] propose a method that considers the distributions of both speeds and time headways to distinguish situations of influence/non-influence between successive vehicles.…”

Section: Literary Reviewmentioning

confidence: 99%

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A Statistically Based Model for the Characterization of Vehicle Interactions and Vehicle Platoons Formation on Two-Lane Roads

Mauro

Pompigna

2022

Sustainability

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Two-lane roads are the most significant part of the road network in many countries, and are widely used for systematic and non-systematic daily travels. Traffic on a two-lane road typically involves a high level of interaction among vehicles, with the formation of platoons. As a part of the road network of a country, they represent a crucial development factor from a social and economic point of view, because they ensure the close accessibility of the innermost areas and local markets, and favor the connection between the nodal points of the logistic system and the last mile of the supply and distribution chain. Thus, the estimation of the presence of vehicle platoons makes it possible to develop significant indicators for performance analysis on this type of road, which in turn is the basis for planning, upgrading, and improving transport programs to find a sustainable balance between environmental, social, and economic qualities. This paper presents a statistically based model, the Two-Lane Roads Statistical Platooning Model (TLR-SPM), which allows for evaluating the percentage of vehicles which are free to travel at the desired speed and of non-free vehicles constrained to travel in platoons at lower speeds than desired, as a function of the traffic flow. Based on a data-driven methodological approach, TLR-SPM allows for going beyond the critical threshold value for time headways, such as the widespread 3 s threshold, but lacks the need to hypothesize, identify, or estimate the probability laws for speed and time headway. From the formal treatment of the general statistical method, the paper shows the data processing procedure through its application to a real case. As shown by the application case and the comparisons with the results of other methods, the proposed model can significantly adapt to the experimental data and can support in analyzing a two-lane road in its operating conditions to promote its safety and efficiency as part of a sustainable transport system.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: The Two-lane Road Statistical Platooning Modelmentioning

confidence: 98%

Section: The Two-lane Road Statistical Platooning Modelmentioning

confidence: 98%

Section: Literary Reviewmentioning

confidence: 99%

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A Statistically Based Model for the Characterization of Vehicle Interactions and Vehicle Platoons Formation on Two-Lane Roads

Mauro

Pompigna

2022

Sustainability

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Platoon-based traffic flow model for estimating breakdown probability at single-lane expressway bottlenecks

Shiomi

Yoshii

Kitamura

2011

Transportation Research Part B: Methodological

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This study investigates the mechanism of traffic breakdown and establishes a traffic flow model that precisely simulates the stochastic and dynamic processes of traffic flow at a bottleneck. The proposed model contains two models of stochastic processes associated with traffic flow dynamics: a model of platoon formation behind a bottleneck and a model of speed transitions within a platoon. After these proposed models are validated, they are applied to a simple one-way, one-lane expressway section containing a bottleneck, and the stochastic nature of traffic breakdown is demonstrated through theoretical exercises.

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A Study on the Estimation of Traffic Flow Conditions and Speed Distribution Model Based on Fluctuations of Traffic Volumes

Chishaki

Kang

1993

Doboku Gakkai Ronbunshu

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Modeling of Elementary and Actual Speed Distributions for Traffic Flow

Cited by 3 publications

References 3 publications

A Statistically Based Model for the Characterization of Vehicle Interactions and Vehicle Platoons Formation on Two-Lane Roads

A Statistically Based Model for the Characterization of Vehicle Interactions and Vehicle Platoons Formation on Two-Lane Roads

Platoon-based traffic flow model for estimating breakdown probability at single-lane expressway bottlenecks

A Study on the Estimation of Traffic Flow Conditions and Speed Distribution Model Based on Fluctuations of Traffic Volumes

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