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- Goni Ros, B. (author), Knoop, V.L. (author), Shiomi, Y (author), Takahashi, T (author), van Arem, B. (author), Hoogendoorn, S.P. (author) journal article 2016
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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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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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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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Knoop, V.L. (author), Hoogendoorn, S.P. (author)Microscopic and macroscopic dynamic traffic models not fast enough to run in an optimization loop to coordinate traffic measures over areas of twice a trip length (50x50 km). Moreover, in strategic planning there are models with a spatial high level of detail, but lacking the features of traffic dynamics. This paper introduces the Network...journal article 2015
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Knoop, V.L. (author), van Lint, J.W.C. (author), Hoogendoorn, S.P. (author)Literature shows that–under specific conditions–the Macroscopic Fundamental Diagram (MFD) describes a crisp relationship between the average flow (production) and the average density in an entire network. The limiting condition is that traffic conditions must be homogeneous over the whole network. Recent works describe hysteresis effects:...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 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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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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- Immers, B. (author), Taale, H. (author), Hoogendoorn, S.P. (author), Wilmink, I. (author), Van Katwijk, R. (author), Knoop, V.L. (author), Schuurman, H. (author) journal article 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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- Yuan, K. (author), Knoop, V.L. (author), Hoogendoorn, S.P. (author) lecture notes 2014
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- Hoogendoorn, S.P. (author), Immers, L.H. (author), Van Katwijk, R. (author), Knoop, V.L. (author), Schuurman, H. (author), Taale, H. (author), Wilmink, I.R. (author) report 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), 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), 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
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- Goni Ros, B. (author), Knoop, V.L. (author), Schakel, W.J. (author), Van Arem, B. (author), Hoogendoorn, S.P. (author) conference paper 2013