A Note on the Analysis of Gap-Acceptance in Traffic

Miller, A. J.

doi:10.2307/2347055

Cited by 20 publications

(11 citation statements)

References 4 publications

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“…The study found that Ashworth method and maximum likelihood technique gave satisfactory results. Miller (1974) further developed a model incorporating real life situations like driver entering into the intersection while considering his lag, inconsistent driver, variation in gap acceptance behavior with age and gender of drivers and type of vehicle. The parameters of the model were estimated using maximum likelihood method.…”

Section: Background Literaturementioning

confidence: 99%

Critical gap through clearing behavior of drivers at unsignalised intersections

Ashalatha¹,

Chandra

2011

KSCE Journal of Civil Engineering

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Critical gap is an engineering concept generally used for determination of capacity of individual movements at unsignalised intersections. Majority of studies on critical gap estimation are reported from homogeneous traffic conditions where lane discipline and the rule of priority are truly respected. Vehicular interactions and drivers' behavior at unsignalised intersections under mixed traffic are very complex. In this study critical gap is estimated by some of the existing methods like lag, Harder, logit, probit, modified Raff and Hewitt methods, at two T-intersections located in the southern part of India. The results show that values of critical gap estimated are as low as 1.60 s and there is a significant variation (12%-38%) among the values estimated by different methods. This highlights the incapability of the existing methods to address the mixed traffic conditions. An alternate procedure of estimation of critical gap making use of clearing behavior of vehicles in conjunction with gap acceptance data is proposed. Incorporating clearing time aspect gives more realistic estimation of critical gap and helps in accurately estimating the entry capacity.

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Section: Background Literaturementioning

confidence: 99%

Critical gap through clearing behavior of drivers at unsignalised intersections

Ashalatha¹,

Chandra

2011

KSCE Journal of Civil Engineering

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“…In early 1980's, researchers developed gap acceptance models by comparing existing methods of critical gap estimation and obtained satisfactory results using Ashworth method (Miller, 1972) and maximum likelihood technique (Miller, 1972;1974). Later, binary logit model was developed (Hamed et al, 1997) to determine the drivers gap acceptance probabilities.…”

Section: Literature Reviewmentioning

confidence: 99%

Multi Vehicle-Type Right Turning Gap-Acceptance and Capacity Analysis at Uncontrolled Urban Intersections

Abhigna

Brahmankar

Ravishankar

2018

Period. Polytech. Transp. Eng.

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“…However, in the United Kingdom-UK where vehicles observe the left hand rive rule just like in South Africa, linear regression is the most commonly used predictive model because it has inbuilt substantive geometric sensitivity and a correction factor for entry radius and entry angles. It has been shown in previous studies [12] that the linear relationship between entry and circulating flows can be modelled with equations 9 and adjusted with equation 10 according to Kimber [14]. Where; Q e = entry flow rate (pcu/h); Q c = circulating flow rate (pcu/h), F is the intercept and fc is the slope Consider equation 12 again, when it rains, a dummy variable (ε) is introduced to depict that condition hence 1, otherwise zero for dry weather.…”

Section: (7)mentioning

confidence: 99%

Effects of Rainfall on Driver Behaviour and Gap Acceptance at Multilane Roundabouts

Ibijola¹,

Ben-Edigbe²

2018

TOTJ

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Background: This paper filled an important gap in the behaviour of driver and gap acceptance model at multilane roundabouts by investigating their traffic performances during rainfall. Introduction: The study carried out an investigation into the impact of rainfall on driver’s behavioural changes and gap acceptance characteristics. Follow-up time headway and gap time were used as proxies. Methodology: Traffic volume, speed, vehicle type and headway data were collected at selected multilane roundabouts in Durban, South Africa. All surveyed roundabouts are within rain gauge catchment area of about 1km. Rainfall intensity was divided into three groups (light, moderate, and heavy). Dry weather data were used as control parameters. Data Analysis: Stepwise data analytical technique was used for ease of explanation and clarity. All model equations were tested for statistical fitness and deemed satisfactory for further analysis. Conclusion: Based on the synthesis of evidence obtained from driver’s behavioural changes and gap acceptance characteristics at multilane roundabouts, the paper concluded that it is correct to suggest that rainfall would have a profound effect on follow-up time headway and critical gap acceptance. However, the effect diminishes gradually as volume to capacity ratio approaches peak traffic operation. Once the threshold value of 0.85 is reached the diminishing effect of rainfall as the sole actuator of anomalous time headway increase is noticeable.

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A Note on the Analysis of Gap-Acceptance in Traffic

Cited by 20 publications

References 4 publications

Critical gap through clearing behavior of drivers at unsignalised intersections

Critical gap through clearing behavior of drivers at unsignalised intersections

Multi Vehicle-Type Right Turning Gap-Acceptance and Capacity Analysis at Uncontrolled Urban Intersections

Effects of Rainfall on Driver Behaviour and Gap Acceptance at Multilane Roundabouts

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