Entry capacity modelling of signalized roundabouts under heterogeneous traffic conditions

Patnaik, Ashish Kumar; Agarwal, Lav; Panda, Mahabir; Bhuyan, Prasanta Kumar

doi:10.1080/19427867.2018.1533160

Cited by 17 publications

(11 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Bundaran merupakan daerah jalinan majemuk yang mampu mengalirkan arus lalu lintas dengan volume rendah hingga medium. Pada kondisi arus lalu lintas dengan volume medium, bundaran lebih efektif dalam mengurangi tundaan lalu lintas bila dibandingkan dengan simpang tanpa APILL [1]. Pada umumnya, diberbagai negara, bundaran diaplikasikan sebagai alternatif simpang tanpa APILL pada arus lalu lintas campuran maupun homogen.…”

Section: Pendahuluanunclassified

Kinerja Lalu Lintas Berdasarkan Okupansi, Komposisi Kendaraan pada Bundaran Tirosa Kota Kupang

Wadu,

Sodanango,

Nenobais

et al. 2024

JITS

View full text Add to dashboard Cite

show abstract

Section: Pendahuluanunclassified

Kinerja Lalu Lintas Berdasarkan Okupansi, Komposisi Kendaraan pada Bundaran Tirosa Kota Kupang

Wadu,

Sodanango,

Nenobais

et al. 2024

JITS

View full text Add to dashboard Cite

show abstract

“…Furthermore, the traffic scenario under heterogeneous traffic conditions is totally different from homogeneous traffic conditions where the ATT stream enjoys uninterrupted flow, and priority rule is always followed. The dynamic and static characteristics of vehicles also vary under heterogeneous traffic conditions ( 24 , 25 ).…”

Section: Problem Statement and Research Contributionmentioning

confidence: 99%

Identification of Spatial and Temporal Dilemma Zone at Mid-Block Median Openings: A Gap Acceptance Based Approach

Khan

Mohapatra

2022

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

A U-turn at a mid-block median opening (MBMO) is a complex maneuver. The U-turning vehicle has to find a suitable gap between two fast-moving vehicles in the approaching through traffic (ATT) stream and decide whether to accept or reject the available gap. Incorrect judgment of an available gap may lead to congestion or a collision between the U-turning vehicle and ATT. Frequently, U-turning vehicles are in a state of dilemma while deciding whether to reject or accept the available gap. Under these scenarios, the decision-making process is a challenging task for U-turning vehicles. This article thus aims to analyze the dilemma zone of U-turning vehicles at MBMO by collecting field data from 14 locations. The dilemma zone has been estimated using three methods: the cumulative distribution method; the binary logit method; and the support vector machine (SVM) method. The length and location of the dilemma zone have been observed to be influenced by different types of vehicle. The dilemma zone has been observed to shift away from the nose of the MBMO as the size of the vehicle increases. Furthermore, a practical yet straightforward equation has been also suggested for estimating the dilemma zone based on the composition of the ATT stream. The outcome of the present study will be beneficial in understanding the dilemma associated with a U-turning driver at an MBMO. The estimated dilemma zone boundary can be used further to develop a warning system in association with the intelligent transportation system for helping U-turning vehicles complete the U-turn movement safely.

show abstract

“…As a result, ASCRs have distinctly different operational characteristics from modern roundabouts. Since then, a series of studies demonstrated that adding signals at the approaches of roundabouts can enhance the capacity [12], eliminate the locking up, and reduce CO 2 emissions [13,14]. In order to calculate the capacity of ASCR, HCM (Highway Capacity Manual) method is usually employed in which the basic formulation is the saturation flow rate multiplied by the effective green time [12].…”

Section: Background Literaturementioning

confidence: 99%

“…Since then, a series of studies demonstrated that adding signals at the approaches of roundabouts can enhance the capacity [12], eliminate the locking up, and reduce CO 2 emissions [13,14]. In order to calculate the capacity of ASCR, HCM (Highway Capacity Manual) method is usually employed in which the basic formulation is the saturation flow rate multiplied by the effective green time [12]. However, traffic delays and formation of long queues at the approaches will still occur because the spaces of circulatory lane inside the ASCRs are not fully utilized.…”

Section: Background Literaturementioning

confidence: 99%

Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length

Jiang

Wang

et al. 2019

Journal of Advanced Transportation

View full text Add to dashboard Cite

Two-stop-line signalized roundabouts (TSLSR) are widely utilized in China. To calculate the capacity and optimal cycle length accurately, a model considering internal space constraint of the roundabout is developed in this paper. Firstly, the operational principle of TSLSR is analyzed. TSLSR is modeled as being equivalent to a four-phase intersection with left-turn protection phases, and the left-turn lane is further simplified as the “short-lane model”. Secondly, based on the above analysis, the capacity of TSLSR is modeled and additionally, the accuracy and sensitivity of the model are also analyzed. Finally, the optimal cycle length of TSLSR which maximizes the capacity is put forward. Results show that the accuracy of the capacity model is low without considering the internal space constraint of the roundabout. However, the model developed in this paper is shown to improve the accuracy (about 20%) and control the relative error to be within 10%. The parameter sensitivity analysis demonstrates that the cycle length and radius of the central island have a significant influence on the capacity of the left-turn lane and results in an optimal value of signal cycle length maximizing the capacity.

show abstract

Entry capacity modelling of signalized roundabouts under heterogeneous traffic conditions

Cited by 17 publications

References 21 publications

Kinerja Lalu Lintas Berdasarkan Okupansi, Komposisi Kendaraan pada Bundaran Tirosa Kota Kupang

Kinerja Lalu Lintas Berdasarkan Okupansi, Komposisi Kendaraan pada Bundaran Tirosa Kota Kupang

Identification of Spatial and Temporal Dilemma Zone at Mid-Block Median Openings: A Gap Acceptance Based Approach

Investigation on Two-Stop-Line Signalized Roundabout: Capacity and Optimal Cycle Length

Contact Info

Product

Resources

About