Capacity Analysis of Priority Intersections with Flare under Mixed Traffic Conditions

Prasetijo, Joewono; Razzaly, Wahid; Wu, Ning; Ambak, Kamarudin; Sanik, Mohd Erwan; Rohani, Munzilah; Ahmad, Halimshah

doi:10.1016/j.sbspro.2014.07.257

Cited by 8 publications

(4 citation statements)

References 4 publications

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“…For serious injury, slight injury and not involving any injury, the numbers need to be multiplied by 3.0, 0.8 and 0.2, respectively [12]. The equation for the above mentioned method is shown in Equation (1).…”

Section: Blackspot Identificationmentioning

confidence: 99%

“…In addition, it has major impacts on the society, economy and progress of a country. Road accidents occur when traffic conflicts between vehicular movements which can cause delay and traffic congestion [1]. Rohani [2] mentioned that human error, traffic, vehicle and road conditions, and the surrounding environment have been determined as key factors that influence driving behaviour, which can in turn contribute to road accidents.…”

Section: Introductionmentioning

confidence: 99%

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Accident Analysis and Highway Safety

et al. 2017

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Abstract. Since 2010, Federal Route FT050 (Jalan Batu Pahat-Kluang) has undergone many changes, including the improvement of geometric features (i.e., construction of median, dedicated U-turns and additional lanes) and upgrading the quality of the road surface. Unfortunately, even with these enhancements, accidents continue to occur along this route. This study covered both accident analysis and blackspot study. Accident point weightage was used to identify blackspot locations. The results reveal hazardous road locations and blackspot ranking along the route.

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Section: Blackspot Identificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Accident Analysis and Highway Safety

et al. 2017

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“…The results indicated that pedestrians and bicycle movements have a significant influence on the capacities of vehicular movements. Prasetijo et al [19] used the occupation time and approaching time of vehicles to calculate the capacity of vehicular movements for each conflict group with flare and without flare intersections under mixed traffic conditions. A comparison was made between the conflict method and the HCM 2000 method.…”

Section: Review Of Literaturementioning

confidence: 99%

Analysis of occupation time of vehicles at urban unsignalized intersections in non-lane-based mixed traffic conditions

Asaithambi

Anuroop

2016

J. Mod. Transport.

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In India, traffic flow on roads is highly mixed in nature with wide variations in the static and dynamic characteristics of vehicles. At unsignalized intersections, vehicles generally do not follow lane discipline and ignore the rules of priority. Drivers generally become more aggressive and tend to cross the uncontrolled intersections without considering the conflicting traffic. All these conditions cause a very complex traffic situation at unsignalized intersections which have a great impact on the capacity and performance of traffic intersections. A new method called additive conflict flow (ACF) method is suitable to determine the capacity of unsignalized intersections in non-lane-based mixed traffic conditions as prevailing in India. Occupation time is the key parameter for ACF method, which is defined as the time spent by a vehicle in the conflict area at the intersection. Data for this study were collected at two three-legged unsignalized intersections (one is uncontrolled and other one is semicontrolled) in Mangalore city, India using video-graphic technique during peak periods on three consecutive week days. The occupation time of vehicles at these intersections were studied and compared. The data on conflicting traffic volume and occupation time by each subject vehicle at the conflict area were extracted from the videos using image processing software. The subject vehicles were divided into three categories: two wheelers, cars, and auto-rickshaws. Mathematical relationships were developed to relate the occupation time of different categories of vehicles with the conflicting flow of vehicles for various movements at both the intersections. It was found that occupation time increases with the increasing conflicting traffic and observed to be higher at the uncontrolled intersection compared to the semicontrolled intersection. The segregated turning movements and the presence of mini roundabout at the semicontrolled intersection reduces the conflicts of vehicular movements, which ultimately reduces the occupation time. The proposed methodology will be useful to determine the occupation time for various movements at unsignalized intersections. The models developed in the study can be used by practitioners and traffic engineers to estimate the capacity of unsignalized intersections in non-lane-based discipline and mixed traffic conditions.

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“…Additive conflict flow technique The gap acceptance procedure is the theoretical basis for analyzing unsignalized intersections. Some researchers modified existing capacity models to account for the effect of mixed traffic scenarios prevailing in developing countries (Prasetijo, Pour and Ghadiri, 2011;Prasetijo and Ahmad, 2012;Prasetijo et al, 2014Prasetijo et al, , 2016Mohan and Chandra, 2020a). But all of these methods are suitable only for right-angled intersections.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Critical Gap and Capacity at Skewed Uncontrolled Intersections

Arathi¹

2023

European Transport/Trasporti Europei

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Critical gaps and capacity of movements at uncontrolled intersections are influenced by intersection geometry, especially in mixed traffic conditions. However, existing models to compute the capacity of uncontrolled base intersections are only suitable for intersections with 00 to 100 skew angles. This study aims to bridge the gap by evaluating the effect of skew angle on the critical gap and capacity of uncontrolled intersections. The critical gap models are developed for different vehicle types. The capacity of uncontrolled intersections is determined for different skew angles (00 to 270) using simulation and Indo-HCM models. The comparison reveals that the Indo-HCM model over-predicts the capacities. Thus, new capacity models are proposed, and it is observed that the capacity varies as a quadratic function of the skew angle, where the constant indicates base capacity. This study also provides the adjustment factors for Indo-HCM capacity models to deduce the capacity of any skew-angled intersections.

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Capacity Analysis of Priority Intersections with Flare under Mixed Traffic Conditions

Cited by 8 publications

References 4 publications

Accident Analysis and Highway Safety

Accident Analysis and Highway Safety

Analysis of occupation time of vehicles at urban unsignalized intersections in non-lane-based mixed traffic conditions

Analysis of Critical Gap and Capacity at Skewed Uncontrolled Intersections

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