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de Jong, Eveline (author), Baggen, J.H. (author), Knoop, V.L. (author)Het luchtzijdige wegverkeerssysteem op de luchthaven Amsterdam Airport Schiphol (Schiphol) is een niet-openbaar wegverkeerssysteem dat wordt gebruikt door afhandelaren van de vliegtuigen, bussen voor de passagiers en de ordehandhaving van de luchthaven. Naast een grote verscheidenheid aan voertuigen die we er aantreffen gelden er ook andere...conference paper 2016
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Knoop, V.L. (author), Tamminga, G.F. (author), Leclercq, Ludovic (author)Traffic flow can be modelled at different levels, of which the vehicle level and the link level are mostly used. Recently, traffic relationships at a higher, network level are found, and a dynamic traffic flow model has been introduced. This paper tests such a model, the Network Transmission Model (NTM), for the city of The Hague. In this model,...conference paper 2016
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Leclercq, L. (author), Knoop, V.L. (author), Marczak, F (author), Hoogendoorn, S.P. (author)This paper deals with the derivation of analytical formulae to estimate the effective capacity at freeway merges in a multilane context. It extends two previous papers that are based on the same modeling framework but that are restricted to a single lane on the freeway (or to the analysis of the right lane only). The analytical expression for...conference paper 2016
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Goni Ros, B. (author), Knoop, V.L. (author), Kitahama, K. (author), van Arem, B. (author), Hoogendoorn, S.P. (author)Sags are bottlenecks in freeway networks. Nowadays, there is a growing interest in the development of traffic management measures for sags based on the use of in-car systems. This contribution determines the movements that individual (equipped) vehicles should make in order to minimise congestion. Specifically, we optimise the accelerations of...conference paper 2016
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Keyvan Ekbatani, M. (author), Gao, X. (author), Gayah, V.V. (author), Knoop, V.L. (author)Traditionally, urban traffic is controlled by traffic lights. Recent findings of the Macroscopic or Network Fundamental Diagram (MFD or NFD) have led to the development of novel traffic control strategies that can be applied at a networkwide level. One pertinent example is perimeter flow control (also known as gating or metering), which limits...conference paper 2015
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Keyvan Ekbatani, M. (author), Grebert, V. (author), Daamen, W. (author), Knoop, V.L. (author)Understanding the influence of lane changing manoeuvre on the capacity, stability, and breakdown of traffic flows is a crucial issue. In a recent study, four distinct lane change strategies on freeways have been empirically found: (1) Speed Leading; (2) Speed Leading with Overtaking; (3) Lane Leading; (4) Traffic Leading. To the best of our...conference paper 2015
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Keyvan Ekbatani, M. (author), Papageorgiou, M. (author), Knoop, V.L. (author)Recent studies demonstrated the efficiency of feedback-based gating control in mitigating congestion in urban networks by exploiting the notion of network fundamental diagram (NFD). The employed feedback regulator of proportional-integral(PI)-type targets an operating NFD point of maximum throughput to enhance the mobility in the urban road...conference paper 2015
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- Calvert, S.C. (author), Snelder, M (author), Bakri, T (author), Heijligers, B (author), Knoop, V.L. (author) conference paper 2015
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Leclercq, L. (author), Parzani, Céline (author), Knoop, V.L. (author), Amourette, Jennifer (author), Hoogendoorn, S.P. (author)This paper investigates at an aggregated (macroscopic) scale the effects of route patterns on a road network. Four main variables are considered: the production, the mean speed, the outflow and the mean travel distance. First, a simple network with heterogeneous travel distances between origins and destinationsis studied by simulation. It...conference paper 2015
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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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Knoop, V.L. (author), Daamen, W. (author)The fundamental diagram of a road, including free flow capacity and queue discharge rate, is very important for traffic engineering purposes. In the real word, most traffic measurements come from stationary loop detectors. This paper proposes a method to fit Wu’s fundamental diagram to loop detector data. Wu’s fundamental diagram is...conference paper 2014
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Goni Ros, B. (author), Knoop, V.L. (author), Van Arem, B. (author), Hoogendoorn, S.P. (author)Sags are freeway sections along which the gradient changes significantly from downwards to upwards. The capacity of sags is considerably lower than the capacity of normal sections. Consequently, sags are often freeway bottlenecks. Recently, several control measures have been proposed to improve traffic flow efficiency at sags. Those measures...conference paper 2014
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De Bakker, P.F. (author), Knoop, V.L. (author), Tiberius, C.C.J.M. (author), Van Arem, B. (author)Modern advanced motorway traffic control requires lane-specific observations, and provide vehicles with lane-specific control measures. Single-Frequency Precise Point Positioning (SF-PPP) was previously demonstrated to provide sub-meter accurate positions in real-time using a low-cost mass-market receiver and patch antenna. Next to an accurate...conference paper 2014
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Goni Ros, B. (author), Knoop, V.L. (author), Van Arem, B. (author), Hoogendoorn, S.P. (author)We present a new control strategy that aims to reduce total delay at sags. The strategy is based on the concept of mainstream traffic flow control. The traffic density at the bottleneck area is regulated in order to keep it slightly below the critical density, hence preventing traffic from breaking down while maximizing outflow. Density is...conference paper 2014
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Knoop, V.L. (author), De Jong, D.M. (author), Hoogendoorn, S.P. (author)The Macroscopic or Network Fundamental Diagram (NFD) describes the relationship between the network flow and the number of travellers within the network. The shape of the NFD is important for control purposes like perimeter control or routing. However, it is unknown how the network structure influences the shape of the NFD. This is studied in...conference paper 2014
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Knoop, V.L. (author), Buisson, C. (author)This paper analyses methodologies to calibrate and validate probabilistic lane change models. We perform a calibration and validation on lane change models (microscopic and macroscopic) which take the most basic dependencies into account. The resulting model has reasonable parameters, and the goodness of fit for the validation set (hold back...conference paper 2014
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Knoop, V.L. (author), Hoogendoorn, S.P. (author)New IT techniques allow communication and coordination between traffic measures. To best use this, one needs to coordinate over longer distances. Optimization of the measures is not possible using traditional microscopic or macroscopic simulation models. The Network Fundamental Diagram (NFD) describes the relation between flow and density on a...conference paper 2014
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Knoop, V.L. (author), Buisson, C. (author)Lane changes are important in traffic flow operations. They cause differences in flow over lanes and they may determine the onset of congestion. Therefore, it is relevant to have a lane change model for which the predictive power is confirmed. This article calibrates and validates a probabilistic discretionary lane change model, both...conference paper 2014
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Knoop, V.L. (author), De Jong, D.M. (author), Hoogendoorn, S.P. (author)It is analyzed what the effect is of the exact network structure on the shape of the Network Fundamental Diagram (NFD). In order to do so, a tool is developed which can create random networks for which the aggregated properties are the same. Using this tool, different urban networks with the same properties are designed. They show different NFDs...conference paper 2014
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Goni Ros, B. (author), Knoop, V.L. (author), Van Arem, B. (author), Hoogendoorn, S.P. (author)Sags are freeway sections along which the gradient changes significantly from downwards to upwards. The capacity of sags is significantly lower than the capacity of normal sections. As a result, sags often become bottlenecks in freeway networks, causing the formation of congestion in conditions of high traffic demand. Congestion results in a...conference paper 2014