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Yuan, Y. (author), Daamen, W. (author), Hoogendoorn, S. (author), Vrancken, D. (author)The steadily increasing numbers and lengths of traffic jams on freeways have led to the application of Dynamic Traffic Management (DTM) measures all over the world. Ramp metering control has proven to be one of the most efficient means to reduce freeway congestion. Currently, it is expected that integrated and coordinated application of DTM...conference paper 2010
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Schreiter, T. (author), Van Wageningen-Kessels, F.L.M. (author), Yuan, Y. (author), Van Lint, J.W.C. (author), Hoogendoorn, S.P. (author)Dynamic Traffic Management (DTM) aims to improve traffic conditions. DTM usually consists of two steps: first the current traffic is estimated, then appropriate control actions are determined based on that estimate. In order to estimate and control the traffic, a suitable traffic flow model that reproduces the properties of traffic well must be...conference paper 2012
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Yuan, Y. (author), Pel, A.J. (author), Hoogendoorn, S.P. (author)Earlier studies have shown how driving behaviour during emergency evacuation is different from that under “normal” conditions. At the same time, most evacuation studies (where the driving performance is explicitly accounted for) were conducted under the assumption of a fully activated emergency environment. However, the transition phase in...conference paper 2014
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Han, Y. (author), Yuan, Y. (author), Hoogendoorn, S.P. (author)We propose an integrated approach for dynamic route guidance and ramp metering using Linear Quadratic Model Predictive Control (LQMPC). The main objective is to maximize the throughput of the network by guiding traffic flow towards to insufficiently utilized infrastructures. Due to the linear property of the LQMPC, it is fast enough for real...conference paper 2014
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- Yuan, Y. (author), Pel, A.J. (author), Hoogendoorn, S.P. (author) lecture notes 2014
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- Yuan, K. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author) lecture notes 2014
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Yuan, K. (author), Knoop, V.L. (author), Leclercq, L. (author), Hoogendoorn, S.P. (author)In freeways, the maximum traffic flow through a bottleneck is usually higher than the outflow of congestion there. This phenomenon is called the capacity drop. In literature, there are considerable debates about the mechanism causing this phenomenon. This paper studies the mechanism by analyzing real life data of two different days. The traffic...conference paper 2014
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Yuan, K. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)It has been empirically observed for years that the queue discharge rate is lower than the prequeue capacity. This difference is called the capacity drop. The magnitude of capacity drop varies over a wide range, depending on the local traffic conditions. However, it is unknown what determines the capacity drop value. No thorough empirical...journal article 2015
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Yuan, K. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)It has been empirically observed for years that the queue<br/>discharge rate is lower than the pre-queue capacity. This is<br/>called the capacity drop. The magnitude of capacity drop varies over a wide range depending on the local traffic conditions. However, up to now it is unknown what determines the capacity drop value. In fact, there is...poster 2015
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Immers, L.H. (author), Schuurman, H. (author), Taale, H. (author), Wilmink, I.R. (author), van Katwijk, R. (author), Hoogendoorn, S.P. (author), Yuan, Y. (author)2013 was nog het jaar van minder files en minder reistijdverlies, wat weer ten dele samenhing met ‘minder economie’. Maar voor 2014 was een kleine kentering voorzien: er werd weer meer verkeer en ook meer congestie opde Nederlandse wegen verwacht. In hoeverre is die voorspelling uitgekomen? En hoe staat het eigenlijk met de verkeersveiligheid en...report 2015
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- Immers, L.H. (author), Schuurman, H. (author), Taale, H. (author), Wilmink, I.R. (author), van Katwijk, R. (author), Hoogendoorn, S.P. (author), Yuan, Y. (author) report 2015
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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 queue discharge rates vary 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 result in such...journal article 2016
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Hoogendoorn, S.P. (author), Daamen, W. (author), Duives, D.C. (author), Yuan, Y. (author)Determining travel time information from Wi-Fi (or Bluetooth) sensors is not trivial due to various (often technical) reasons. In this contribution, we focus on the problem of distinguishing travel time from the time people spend performing activities (e.g. fuelling the car, standing still to watch the scenery, buying a train ticket). More...conference paper 2016
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Yuan, Y. (author), Hoogendoorn, S.P. (author)In big cities, the proportion of slow-mode (such as pedestrian) flows in total trip demand is steadily growing every year. Along with this trend, many concerns arise about accessibility and safety. The monitoring and the management of pedestrians serve as a potential solution to maintain the resilience of the transport network. Monitoring and...journal article 2016
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Han, Y. (author), Yuan, Y. (author), Hegyi, A. (author), Hoogendoorn, S.P. (author)This paper proposes an extension of the discrete Lighthill–Whitham–Richards model of the cell transmission model type to reproduce capacity drop and the propagation of jam waves. Recent studies have tried to incorporate the capacity drop into discrete first-order traffic flow models for traffic optimization purposes. It was found that the inflow...journal article 2016
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Yuan, K. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)Capacity drop indicates that the queue discharge rate is lower than the road capacity. Due to the capacity drop, traffic delays increase once queues form. Researchers find that queue discharge rates vary in different traffic conditions. Empirical data shows that the queue discharge rate increases as the speed in congestion increases....conference paper 2016
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Daamen, W. (author), Yuan, Y. (author), Duives, D.C. (author), Hoogendoorn, S.P. (author)Nowadays, many large scale events are organised in urban areas that are not designed to accomodate these large visitor flows, as not only the sheer number of people is larger than anticipated, but also their behaviour is different. For a timely deployment of crowd management measures, continuous information on the real-time traffic state on the...conference paper 2016
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- Yuan, K. (author), Knoop, V.L. (author), Leclercq, Ludovic (author), Hoogendoorn, S.P. (author) journal article 2017
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Yuan, K. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author)On freeways, congestion always leads to capacity drop. This means the queue discharge rate is lower than the pre-queue capacity. Our recent research findings indicate that the queue discharge rate increases with the speed in congestion, that is the capacity drop is strongly correlated with the congestion state. Incorporating this varying...journal article 2017
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Han, Y. (author), Hegyi, A. (author), Yuan, Y. (author), Hoogendoorn, S.P. (author), Papageorgiou, Markos (author), Roncoli, Claudio (author)In this paper we develop a fast model predictive control (MPC) approach for variable speed limit coordination to resolve freeway jam waves. Existing MPC approaches that are based on the second-order traffic flow models suffer from high computation load due to the non-linear and non-convex optimization formulation. In recent years, simplified...journal article 2017
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