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van Erp, P.B.C. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)This article presents a procedure to estimate the macroscopic traffic state in a pre-defined space-time mesh using relative flow data collected by stationary and moving observers. The procedure consist of two consecutive and independent processes: (1) estimate point observations of the cumulative vehicle number in space-time, i.e., N(x, t),...journal article 2018
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Jin, C.J. (author), Knoop, V.L. (author), Jiang, Rui (author), Wang, Wei (author), Wang, Hao (author)For traffic flow models, calibration and validation are essential. Cellular automaton (CA) models are a special class of models, describing the movement of vehicles in discretised space and time. However, the previous work on calibration and validation does not discuss CA models systematically. This study calibrates and validates a stochastic...journal article 2018
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- Knoop, V.L. (author), Daamen, W. (author), Schadschneider, Andreas (author), Seyfried, Armin (author) contribution to periodical 2018
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Jin, C.J. (author), Knoop, V.L. (author), Li, Dawei (author), Meng, Ling Yu (author), Wang, Hao (author)In this paper, we discuss the mechanisms for discretionary lane-changing behavior in traffic flow. NGSIM video data are used to check the validity of different lane-changing rules, and 373 lane changes at 4 locations in US-101 highway are analyzed. We find that the classical lane-changing rules of rule-based model cannot explain many cases in...journal article 2018
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Wierbos, M.J. (author), Goni Ros, B. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)In many countries, an increasing number of people are using the bicycle for urban trips. The increased bicycle flow sometimes creates local congestion at intersections and demands better bicycle traffic management. To provide policy<br/>makers with models and advice on how to prevent congestion, an increased understanding of queue dynamics is...conference paper 2018
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- Sparnaaij, M. (author), Duives, D.C. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author) conference paper 2018
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van Erp, P.B.C. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)In ruwe vorm zijn floating car data rijk en uiterst gedetailleerd. Het punt is alleen dat we om privacyredenen niet met die ruwe data mogen werken – we moeten het doen met geaggregeerde data die door een privacyfilter zijn gehaald. Is daarmee nog enige verkeersmanagement-eer te behalen? Jawel, mits je de FCD slim combineert met bijvoorbeeld...journal article 2018
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- van Erp, P.B.C. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author) conference paper 2018
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- de Baat, Marco (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author) journal article 2018
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- Wierbos, M.J. (author), Knoop, V.L. (author), Hanseler, F.S. (author), Hoogendoorn, S.P. (author) conference paper 2018
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Yuan, K. (author), Lavala, Jorge (author), Knoop, V.L. (author), Jiang, Rui (author), Hoogendoorn, S.P. (author)Traffic flow downstream of the congestion is generally lower than the pre-queue capacity. This phenomenon is called the capacity drop. Recent empirical observations show a positive relationship between the speed in congestion and the queue discharge rate. Literature indicates that variations in driver behaviors can account for the capacity drop....journal article 2018
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Knoop, V.L. (author), Daganzo, Carlos F. (author)In urban areas and especially in inner cities, pedestrians crossing the road considerably influence the road traffic flow. For political reasons, priority could be given to pedestrians. A larger number of crossings reduces the pedestrian load per crossing and facilitates both the pedestrian flow and the car flow; the ultimate case is a “cross...journal article 2018
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Knoop, V.L. (author), Keyvan-Ekbatani, M. (author), de Baat, Marco (author), Taale, Henk (author), Hoogendoorn, S.P. (author)Freeways forman important part of the road network. Yet, driving behavior on freeways, in particular lane changes and the relation with the choice of speed, is not well understood. To overcome this, an online survey has been carried out. Drivers were shown video clips, and after each clip they had to indicate what they would do after the moment...journal article 2018
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van Erp, P.B.C. (author), Thoen, Sebastiaan (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)The fundamental diagram (FD) describes the relation between the flow and density in equilibrium conditions. In this paper, we propose an estimation approach to estimate the FD based on data from moving observers. This approach consists of two main steps: (1) estimate flow and density for space-time areas based on trajectories of moving observers...conference paper 2018
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Lu, Shoufeng (author), Knoop, V.L. (author), Keyvan-Ekbatani, M. (author)A two-Fluid Model (TFM) of urban traffic provides the macroscopic description of traffic state. The TFMs parameters are hard to calibrate, particularly for the dynamic traffic conditions. This leads to the TFM often being used to compare the quality of service through the plot of stopping time versus trip time of the vehicles in the network....journal article 2018
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van Erp, P.B.C. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)Traffic state estimation is a crucial element in traffic management systems and in providing traffic information to road users. In this article, we evaluate traffic sensing data-based estimation error characteristics in macroscopic traffic state estimation. We consider two types of sensing data, that is, loop-detector data and probe speed...journal article 2017
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Knoop, V.L. (author), de Bakker, P.F. (author), Tiberius, C.C.J.M. (author), van Arem, B. (author)Modern intelligent transport solutions can achieve an improvement of traffic flow on motorways. With lane-specific measurements and lane-specific control, more measures are possible. Single frequency precise point positioning (PPP) is a newly developed and affordable technique to achieve an improved position accuracy compared with global...journal article 2017
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Knoop, V.L. (author)Traffic processes cause several problems in the world. Traffic delay, pollution are some of it. They can be solved with the right road design or traffic management (control) measure. Before implementing these designs of measures, though, their effect could be tested. To this end, knowledge of traffic flow theory is needed.<br/>This book is meant...book 2017
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Yuan, K. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)The capacity drop indicates that the queue discharge rate is lower than the free-flow capacity. Studies show that the queue discharge rate varies under different traffic conditions. Empirical data show that the queue discharge rate increases as the speed in congestion increases. Insights into the underlying behavioral mechanisms that cause...journal article 2017
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Knoop, V.L. (author), Keyvan-Ekbatani, M. (author), de Baat, Marco (author), Taale, Henk (author), Hoogendoorn, S.P. (author)Freeways form an important part of the road network. Drivers’ behavior can be split in longitudinal (acceleration and deceleration) and lateral behavior (lane changing). The combination of these two behaviors on freeways play a key role in traffic operations. This paper tries to describe the driving behavior, emphasizing the relation between the...conference paper 2017