A Case Study on Roundabout under Congestion: Proposal to Improve Current Traffic Operation

Aboud, Ghufraan Mohammed; Abdulwahab, Areej Muhy; Banyhussan, Qais Sahib; Zubaidi, Hamsa

doi:10.28991/cej-2019-03091391

Cited by 6 publications

(6 citation statements)

References 5 publications

(7 reference statements)

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“…The total delay is 127.84veh-h/h, the average geometric delay is 2.7s/veh, and the average control delay of the roundabout is 57.2s/veh, thus the level of service for the roundabout is E according to the LOS categories of the software that are based on the SIDRA method. The LOS of four/five approach multi-lane roundabout suffering medium/high volumes and delays is ranging from E to F according to [10,13,22]. Regarding the performance of the Al-Jadriyah intersection, the maximum cycle time according to [23] (120s) was inputted to SIDRA Intersection.…”

Section: Resultsmentioning

confidence: 99%

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Efficiency Assessment of a Signalized Roundabout and a Traffic Intersection in Baghdad City

Mohammed

Ismail

2021

Eng. Technol. Appl. Sci. Res.

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In Baghdad city, Iraq, the traffic volumes have rapidly grown during the last 15 years. Road networks need to reevaluate and decide if they are operating properly or not regarding the increase in the number of vehicles. Al-Jadriyah intersection (a four-leg signalized intersection) and Kamal Junblat Square (a multi-lane roundabout), which are two important intersections in Baghdad city with high traffic volumes, were selected to be reevaluated by the SIDRA package in this research. Traffic volume and vehicle movement data were abstracted from videotapes by the Smart Traffic Analyzer (STA) Software. The performance measures include delay and LOS. The analysis results by SIDRA Intersection 8.0.1 show that the performance of the roundabout is better than the signalized intersection but experiences high delay, and low LOS. Therefore, alternatives are proposed to improve the performance for current and future traffic volumes with low-medium delays.

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Section: Resultsmentioning

confidence: 99%

“…Authors in [13] used SIDRA to evaluate LOS and delays of the Al-Turkman Roundabout in Baghdad to improve its performance by proposing planning procedures to address the traffic jam and congestion problems in this area. In [14], the authors studied the performance of two signalized intersections in Bangi, Malaysia using the SIDRA software.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Assessment of a Signalized Roundabout and a Traffic Intersection in Baghdad City

Mohammed

Ismail

2021

Eng. Technol. Appl. Sci. Res.

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“…Moreover, the degree of service at the intersection greatly impacts the road's total level of service [5]. Increasing the intersection's capacity is essential for expanding any road's carrying capacity.…”

Section: Original Researchmentioning

confidence: 99%

ASSESSMENT OF SIGNALIZED INTERSECTION: A CASE STUDY IN BAGHDAD City by USING SIDRA SOFTWARE

Aboud,

Khaled,

Ezzat

et al. 2024

J. eng. sustain. dev.

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Over the world, signalized intersections and road networks with heavy traffic have posed severe issues. So, it is crucial to employ cutting-edge software tools to ensure the current system can be managed and assessed. Therefore; this paper aims to analyze and evaluate the traffic flow performance at AL-Masbah signalized intersections in Baghdad city during peak hours by utilizing SIDRA INTERSECTION 5. For purposes of evaluation, the Level of Service LOS, average delay time, capacity, degree of saturation, queue for Intersection, fuel consumption, and carbon dioxide emission have been considered. In this study, video count was used to collect data. The main input data included peak hour factor (PHF), numbers and width of lanes, percent of heavy vehicles for each direction and movement, median, phasing, and timing. The results of the analysis indicated that the intersection is operated at LOS ( F) with a backlog queue of 166.1 which is the queue for any lane used by movement (vehicles)and a 1262m queue for any lane used by movement (meters) m, while fuel consumption was at a rate of 849.9 liters per hour. Furthermore, the results revealed that carbon dioxide (CO2) emission was increased by 2124.8 Kg per hour. So, It can be concluded that the intersection needs to improve its level of service by changing its geometry or by implementing an Intelligent Transportation System (ITS).

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“…The camera has also protective cover, which protects camera lens against direct sunlight as well as bed weather conditions. The following Table 1 represents a matrix of traffic routing on the roundabout during the peak hour [1,2]. The most loaded entrance during a peak hour is the entrance number 3 with intensity of 1126 vehicles.…”

Section: Transport Survey On the Chosen Small Roundaboutmentioning

confidence: 99%

“…a. Passage time calculation -it is a time between the end of one signal phase and the beginning of incoming phase (1).…”

Section: Creating and Simulating Of Transport Environment In Transpor...mentioning

confidence: 99%

Comparison of Traffic Flow Characteristics of Signal Controlled Intersection and Turbo Roundabout

Kubíková

Kalašová

Čulík

et al. 2020

The Archives of Automotive Engineering – Archiwum Motoryzacji

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In the Slovak republic, there is an increase of building roundabouts in both urban and non-build-up areas. The construction of roundabouts in urban areas brings mainly calming of traffic intensity. A roundabout in non-build-up areas could be built only within certain conditions. In this paper, we have been studying a small roundabout location and its traffic characteristics in the city of Hlohovec. In some cases, a small roundabout could be very good solution for exceeded traffic flow capacity of signal controlled intersections as well as for intersections with a high number of traffic incidents. But in our case, a small roundabout is not suitable for such intensity of vehicles as we measured in transport survey. So we focused on other possibilities how to improve this current situation. We have decided to make a proposal of signal controlled intersection as well as a turbo roundabout and compare the results of traffic characteristics of each proposal. We have made several simulations of each variant of traffic situation, using transport-planning software Aimsun, and calculate average values of all recorded traffic characteristics. As inputs, we have used intensities and other basic data obtained from transport survey. Using simulations outputs of transport planning software, we have been able to compare a current state with signal controlled intersection and turbo roundabout. Traffic characteristics of turbo roundabout show significant improvements compare to signal controlled intersection, f.e. in delay time (more than 68 %), travel time (more than 22 %), number of stops (more than 73 %). Turbo roundabout seems to be the best solution for traffic organising at this chosen intersection in the city of Hlohovec, regarding travel time, delays, number of stops and safety at all.

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A Case Study on Roundabout under Congestion: Proposal to Improve Current Traffic Operation

Cited by 6 publications

References 5 publications

Efficiency Assessment of a Signalized Roundabout and a Traffic Intersection in Baghdad City

Efficiency Assessment of a Signalized Roundabout and a Traffic Intersection in Baghdad City

ASSESSMENT OF SIGNALIZED INTERSECTION: A CASE STUDY IN BAGHDAD City by USING SIDRA SOFTWARE

Comparison of Traffic Flow Characteristics of Signal Controlled Intersection and Turbo Roundabout

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