Modeling of Freeway Ramp Merging Process Observed During Traffic Congestion

Sarvi, Majid; Ceder, Avishai; Kuwahara, Masao

doi:10.1016/b978-008043926-6/50026-9

Cited by 14 publications

(19 citation statements)

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“…The second decision, which involves the ramp driver searching for and accepting a suitable gap, has been extensively studied for the free-flow merging condition , Daganzo 1981, Makigami et al 1988, Chang and Kao 1991, Ahmed et al 1996, Kita 1999, Kurian 2000. The gap searching and acceptance maneuvers commonly observed under free-flow conditions do not occur under heavy traffic flow conditions, according to a macroscopic study by Sarvi and Kuwahara (1999) and Sarvi (2000). These macroscopic studies found no significant correlation between the acceleration lane length and the maximum flow rate in the merging sections.…”

Section: The Decision Process Of Driversmentioning

confidence: 98%

“…A comprehensive traffic survey and onsite observation have shown that the decision-making process of drivers in merging situations can be divided into three zones, as shown in Figure 3 (Sarvi 2000). The decisions required in each zone can be expressed as follows.…”

Section: The Decision Process Of Driversmentioning

confidence: 99%

“…The third driver decision is related to the known car-following behavior, which describes how a pair of vehicles interacts with each other, and will not be dealt with in this paper. The reader can refer to Sarvi et al 2002Sarvi et al , 2004Sarvi et al , and 2005. Table 2 lists the possible interactions between vehicles approaching and engaging the merging area under congested traffic conditions, established through thorough observations as described in section 3.…”

Section: The Decision Process Of Driversmentioning

confidence: 99%

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Observing freeway ramp merging phenomena in congested traffic

Sarvi

Kuwahara

Ceder

2007

J of Advced Transportation

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This work conducts a comprehensive investigation of traffic behavior and characteristics during freeway ramp merging under congested traffic conditions. On the Tokyo Metropolitan Expressway, traffic congestion frequently occurs at merging bottleneck sections, especially during heavy traffic demand. The Tokyo Metropolitan Expressway public corporation, generally applies different empirical strategies to increase the flow rate and decrease the accident rate at the merging sections. However, these strategies do not rely either on any behavioral characteristics of the merging traffic or on the geometric design of the merging segments. There have been only a few research publications concerned with traffic behavior and characteristics in these situations. Therefore, a three-year study is undertaken to investigate traffic behavior and characteristics during the merging process under congested situations. Extensive traffic data capturing a wide range of traffic and geometric information were collected using detectors, videotaping, and surveys at eight interchanges in Tokyo Metropolitan Expressway. Maximum discharged flow rate from the head of the queue at merging sections in conjunction with traffic and geometric characteristics were analyzed. In addition, lane changing maneuver with respect to the freeway and ramp traffic behaviors were examined. It is believed that this study provides a thorough understanding of the freeway ramp merging dynamics. In addition, it forms a comprehensive database for the development and M. Sarvi, M. Kuwahara and A. Ceder 146 implementation of congestion management techniques at merging sections utilizing Intelligent Transportation System.

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Section: The Decision Process Of Driversmentioning

confidence: 98%

Section: The Decision Process Of Driversmentioning

confidence: 99%

Section: The Decision Process Of Driversmentioning

confidence: 99%

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Observing freeway ramp merging phenomena in congested traffic

Sarvi

Kuwahara

Ceder

2007

J of Advced Transportation

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“…Wang et al (2005) developed model for motorway traffic merging behavior by explicitly simulating the interactions between the gap-acceptance behavior of the merging traffic and the cooperative behavior of the motorway traffic. Sarvi, Ceder, & Kuwahara, 2002, 2005 have done extensive studies on traffic behavior and characteristics during merging process under congested conditions, using ramp and freeway lag driver acceleration-deceleration behavior modeling. Kuwahara (2007, 2008) developed the Freeway Merging Capacity Simulation Program to evaluate the capacity of a merging section and the model was also employed to develop a variety of intelligent transport system control strategies.…”

Section: Leadmentioning

confidence: 99%

Study of unique merging behavior under mixed traffic conditions

Kanagaraj

Srinivasan

Sivanandan

et al. 2015

Transportation Research Part F: Traffic Psychology and Behaviou

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“…Michaels and Fazio, 1989;Yang and Koutsopoulos, 1996). However motorway traffic has in fact been seen to exhibit a kind of cooperative behaviour by changing to the inner lanes upon approaching the merge section or by yielding to create gaps for the merging traffic (Hounsell and McDonald, 1992;Sarvi et al, 2002;Elefteriadou et al 1995;Evans et al, 2001;Troutbeck, 2002;Bunker and Troutbeck, 2003). Such a cooperative process, which is also called "limited priority system", has recently received some attention.…”

Section: Introductionmentioning

confidence: 99%

A Simulation Model for Motorway Merging Behaviour

Wang¹

2005

Transportation and Traffic Theory

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The most difficult sections of motorway to analyze satisfactorily are the merging sections, because these are where the majority of conflicts and interactions occur. The situation is more complicated than simple gap acceptance because the ramp traffic is not only seeking gaps in the main motorway traffic; its presence also influences the behaviour of drivers on the main motorway. The latter may choose to move to the inner lanes on the motorway or to slow down to create gaps for the merging traffic. Traditional modelling is unable to represent such complex behavioural responses and interactions. This paper presents a new model of motorway traffic merging behaviour by explicitly simulating the interactions between the gap-acceptance behaviour of the merging traffic and the cooperative behaviour of the motorway traffic. Sensitivity analysis of the model suggests that cooperative lane-changing and yielding have a significant effect on the proportion of merges that are made easily. Similarly, the more alert the drivers are, the higher the proportion that successfully merge into their first choice of gaps. A longer acceleration lane does not appear to increase the proportion that successfully merges into the driver's first choice of gaps; it does however help when merging into the second or third choices. A preliminary calibration of the model suggests that the modelled gap distribution fits well with those observed. Further research will examine the extent to which cooperative behaviour helps the merging traffic without inducing instability in the motorway traffic.2 Insert book title here BACKGROUND

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Modeling of Freeway Ramp Merging Process Observed During Traffic Congestion

Cited by 14 publications

References 0 publications

Observing freeway ramp merging phenomena in congested traffic

Observing freeway ramp merging phenomena in congested traffic

Study of unique merging behavior under mixed traffic conditions

A Simulation Model for Motorway Merging Behaviour

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