Results 81 to 90 of about 363 (120)
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Optimizing the integrated off-ramp signal control to prevent queue spillback to the freeway mainline
Transportation Research Part C: Emerging Technologies, 2021Abstract This study presents an integrated off-ramp control model that incorporates the impact of ramp queue spillback on the freeway mainline in design of the off-ramp intersection’s signal plan. The proposed model consists of a mesoscopic traffic module to capture the complex interrelations between the freeway mainline’s traffic state and the lane ...
Yen-Yu Chen +2 more
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Control Delay at Signalized Diamond Interchanges considering Internal Queue Spillback
Transportation Research Record: Journal of the Transportation Research Board, 2010Control delay is the primary measure for determination of the level of service of signalized intersections. The existing analytical delay models usually work well for isolated intersections, but are not as effective when applied to diamond interchanges. The limited storage space between the two closely spaced intersections of a diamond interchange may
Hao Xu, Hongchao Liu, Zong Tian
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Computing Individual Path Marginal Cost in Networks with Queue Spillbacks
Transportation Research Record: Journal of the Transportation Research Board, 2011“Individual path marginal cost” (IPMC) is defined as the change in travel cost of one unit of flow on a time-dependent path caused by one unit of flow on another time-dependent path. Knowledge of IPMC is central to dynamic transportation modeling, for instance, to compute system-optimal network performance, to solve a dynamic origin–destination (O-D ...
Zhen (Sean) Qian, H. Michael Zhang
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Optimizing Bus Lane Placement on Networks while Accounting for Queue Spillbacks
2018 21st International Conference on Intelligent Transportation Systems (ITSC), 2018Implementing dedicated bus lanes on a network can improve bus travel times at the detriment of cars due to the reduced car capacities, especially at intersections. The optimum solution for the system considering both car and bus passengers is often unclear.
Murat Bayrak, S. Ilgin Guler
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Network throughput under dynamic user equilibrium: Queue spillback, paradox and traffic control
Transportation Research Part B: Methodological, 2019Abstract This study aims to analyze the relationship between a macroscopic fundamental diagram (MFD), which relates vehicle accumulation with throughput at the network level, and the spatial distribution of congestion (congestion pattern) in a general network with one-to-many origin-destination demands.
Kentaro Wada +3 more
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Transportation Research Part C: Emerging Technologies, 2020
Abstract This paper focuses on traffic parameters estimation at signalized intersections based on a framework combining shockwave analysis (SA) and Bayesian Network (BN) using vehicle trajectory data. Detailed queuing evolution and spillback across adjacent intersections are considered.
Wang, Shuling CIVL +2 more
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Abstract This paper focuses on traffic parameters estimation at signalized intersections based on a framework combining shockwave analysis (SA) and Bayesian Network (BN) using vehicle trajectory data. Detailed queuing evolution and spillback across adjacent intersections are considered.
Wang, Shuling CIVL +2 more
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Oscillatory Traffic Flow Patterns Induced by Queue Spillback in a Simple Road Network
Transportation Science, 2008We study in this paper some consequences of queue spillback in a simple road network with a steady demand and provide exact formulas for traffic flow patterns. This one origin-destination pair, two-route network contains a diverge and a merge, and the interaction of queues formed at the merge produces several interesting traffic flow patterns, of ...
Yu (Marco) Nie, H. Michael Zhang
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Continuous-time dynamic system optimum for single-destination traffic networks with queue spillbacks
Transportation Research Part B: Methodological, 2014Dynamic system optimum (DSO) is a special case of the general dynamic traffic assignment (DTA). It predicts the optimal traffic states of a network under time-dependent traffic conditions from the perspective of the entire system. An optimal control framework is proposed in this paper for the continuous-time DSO problem for single-destination traffic ...
Rui Ma +2 more
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Impact of Exit Ramp Geometric Treatments at Diverging Diamond Interchanges on Queue Spillback
Transportation Research Record: Journal of the Transportation Research Board, 2016Diverging diamond interchanges (DDIs) have swept the country as an innovative interchange system since the original U.S. installation in Springfield, Missouri, in 2009. Although the DDI provides many benefits, prior research identified some operational challenges found at some of the first DDIs built around the country.
Shannon Warchol +2 more
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Arterial Queue Spillback Detection and Signal Control Based on Connected Vehicle Technology
Transportation Research Record: Journal of the Transportation Research Board, 2013Queue spillbacks are a major problem in urban signalized arterials because such spillbacks can lead to gridlock and excessive delays. Several methods based on fixed-location detector data have been proposed to identify the occurrence of queue spillbacks and implement signal control strategies to mitigate their impacts.
Eleni Christofa +2 more
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