Comparing the efficiency of the super diverging diamond interchange to other innovative interchanges’

Alzoubaidi, Mutasem; Molan, Amirarsalan Mehrara; Ksaibati, Khaled

doi:10.1016/j.simpat.2020.102174

Cited by 11 publications

(3 citation statements)

References 18 publications

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“…This issue arises due to the rapid increase in vehicle ownership relative to population and income growth (Guzman et al, 2020). Unconventional intersections and interchanges (UAIDs) show their capability to reduce traffic congestion, improve traffic operation and increase infrastructure capacity (Alozi and Hussein, 2022;Alzoubaidi et al, 2021;Ciampa et al, 2020;Corriere and Guerrieri, 2013;ElKashef et al, 2021;Hadidi et al, 2022;Jewel et al, 2022;Mane and Pulugurtha, 2020). Fundamentally, UAIDs aim to increase the efficiency of major intersections by reducing the number of turning movements and signal phases.…”

Section: Introductionmentioning

confidence: 99%

The Feasibility and Operational Performance of Implementation Median U-turn Intersections: A CRITIC Method

Alhadidi,

Matarneh,

Abu Tahoon

2024

Period. Polytech. Transp. Eng.

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Currently, a growing number of cities are adopting the Median-U-Turn (MUT) intersection design to enhance road capacity and traffic efficiency. The critical question in selecting the right intersection design is how significantly the implementation of MUT can enhance intersection performance, focusing on three key aspects: intersection efficiency, capacity, and the environmental impact of the design. To address this question, an evaluation of operational performance under various prevailing conditions (roadway and control) was conducted using VISSIM, a microscopic simulation platform. This evaluation involved five scenarios: conventional intersections (with increased cycle length, grade separation with a signalized at-grade intersection, grade separation with a roundabout), MUT, and signalized crossover MUT at a dense urban arterial intersection in Amman, Jordan's capital. The performance was compared using several metrics: average control delay, number of stops, average travel speed and time, average stopped delay, Carbon Monoxide (CO) emissions, fuel consumption, and vehicle safety. The Criteria Importance Through Intercriteria Correlation (CRITIC) technique was subsequently used to select the optimal design. The findings indicate that the existing intersection configuration is the least effective, while the MUT with signals at the crossing U-turn points is the most efficient solution.

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Section: Introductionmentioning

confidence: 99%

The Feasibility and Operational Performance of Implementation Median U-turn Intersections: A CRITIC Method

Alhadidi,

Matarneh,

Abu Tahoon

2024

Period. Polytech. Transp. Eng.

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“…As a consequence, the number of signal phases is reduced leading to delay reductions and improved progression along arterials (Reid, 2004). Recent studies have shown that unconventional geometric designs are capable of improving the overall operational and safety performances substantially (Alzoubaidi, Molan, et al, 2021;Moon et al, 2011;Zlatkovic, 2019). The continuous flow intersection (CFI) is an unconventional intersection design in which left turns are displaced from the intersection approaches using an added upstream crossover.…”

Section: Introductionmentioning

confidence: 99%

Safety Performance Evaluation of Continuous Flow Intersections in the Era of Connected Vehicles: A Microsimulation Modelling Approach

Alzoubaidi

Zlatkovic

2022

PIS

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This study employed Federal Highway Administration’s Surrogate Safety Assessment Model (SSAM) to investigate the safety of implementing Connected Vehicles (CVs) at the Continuous Flow Intersection (CFI), by reproducing a real-world corridor, that has multiple successive implementations of CFIs, in VISSIM. Econolite’s ASC/3 Software-in-the-Loop signal controllers and Python-programmed Vehicle to Infrastructure (V2I) communications were embedded in VISSIM. Additionally, the effect of CV-Market Penetration Rate (CV-MPR) on safety is taken into consideration. The study shows that CV deployments at partial and full CFIs leads to notable reductions in crash likelihoods and severities. The total number of conflicts, rear-end and lane change conflicts dropped by 23.8%, 23.6% and 24.4%, respectively at full CFIs and 100% MPR, whereas those were reduced by 6.4%, 4.8% and 17.9%, respectively at partial CFIs and 100% MPR. It was also found that at least a 50% MPR of CVs is required for safety improvements to be influential.

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“…The study uses the direct output files from the simulation to analyze the mobility benefits of the application. The Surrogate Safety Assessment Model (SSAM) developed by the Federal Highway Administration (FHWA) is a tool that can be used to measure the safety performance in simulation models ( 9 – 12 ). The study used the simulated vehicle trajectories to identify, classify, and evaluate the safety benefits of the application based on surrogate safety measures (SSMs) utilizing SSAM ( 10 ).…”

mentioning

confidence: 99%

Hardware-in-the-Loop Simulation for Assessing Red-Light Violation Warning Application With Semi-Actuated Signal Control in a Connected Vehicle Environment

Arafat¹,

Hadi

Hunsanon

et al. 2022

Transportation Research Record: Journal of the Transportation R

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Understanding the safety and mobility impacts of connected vehicle (CV) applications is critical for ensuring effective implementations of these applications. This study provides an assessment of the safety and mobility impacts of the red-light violation warning (RLVW), a CV-based application at signalized intersections, under semi-actuated signal control utilizing a hardware-in-the-loop simulation environment. With actuated traffic signal operations, there is uncertainty in the end-of-green information provided to the vehicles using CV messages. The RLVW algorithm lacks the input information about when exactly the phase is going to be terminated since this termination occurs when a gap of a particular length is encountered at the detector. This study investigates a method recently proposed in a national effort to provide an assured green period (AGP) to grant definitive times for when the green interval will end. AGP mitigates the uncertainties related to termination of the green signal associated with actuated signal control and is expected to improve the performance of the CV RLVW application. Results showed that the safety benefits of RLVW without the use of AGP were limited. On the other hand, by introducing AGP with 100% RLVW, the number of red-light running events at signalized intersections was reduced by approximately 92%. However, the application of the AGP, as applied and assessed in this paper, can increase the number of stops and approach delay. This issue will need to be further investigated to determine the optimal setting of the AGP considering both mobility and safety impacts.

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Comparing the efficiency of the super diverging diamond interchange to other innovative interchanges’

Cited by 11 publications

References 18 publications

The Feasibility and Operational Performance of Implementation Median U-turn Intersections: A CRITIC Method

The Feasibility and Operational Performance of Implementation Median U-turn Intersections: A CRITIC Method

Safety Performance Evaluation of Continuous Flow Intersections in the Era of Connected Vehicles: A Microsimulation Modelling Approach

Hardware-in-the-Loop Simulation for Assessing Red-Light Violation Warning Application With Semi-Actuated Signal Control in a Connected Vehicle Environment

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