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- Knoop, A.H. (author) conference paper 2006
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Knoop, V.L. (author), Snelder, M. (author), Van Zuylen, H.J. (author)Much of the delay in transport networks is caused by incidents. Many indicators are developed to determine vulnerable parts of a network without simulating the network flows with an incident on each of the links. This paper lists indicators proposed in literature and cross compares them. Their values for all links on three networks of different...conference paper 2007
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), van Zuylen, H.J. (author)Insight into traffic flow characteristics is often gained using local measurements. To determine macroscopic flow characteristics, time aggregation of microscopic information is required.<br/><br/>Usually, a data collection system stores values averaged over time. However, it is well known that a time mean average overestimates the influence of...conference paper 2009
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Van Zuylen, H.J. (author)The delay caused by an incident depends on many variables. This paper introduces an analytical expression for the delay, describing the location and length of the queue by shockwave theory. As long as the congestion remains on the same link, delay is proportional to the square of the duration, even in case the outflow is reduced by a junction...conference paper 2009
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Van Zuylen, H.J. (author)The delay caused by an incident depends on many variables. This paper introduces an analytical expression for the delay, describing the location and length of the queue by shockwave theory. As long as the congestion remains on the same link, delay is proportional to the square of the duration, even in case the outflow is reduced by a junction...conference paper 2009
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Knoop, V.L. (author), Van Zuylen, H.J. (author), Hoogendoorn, S.P. (author)Much of the delays on road networks are caused by incidents. This is partially caused by blockage or closure of lanes, but also by the change of driving behaviour in the remaining lanes. This contribution analyses traffic flow conditions near an incident both microscopically and macroscopically. A theory is proposed to describe drivers’...conference paper 2009
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Van Zuylen, H.J. (author)The duration of incidents is a stochastic variable with a variation spread. This chapter analyzes the consequences of this stochastic nature of the duration in terms of delay. It uses shockwave theory to describe traffic states. As opposed to a point queue model, the head and the tail of the queue are separately modeled and in this way the...conference paper 2010
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Van Zuylen, H.J. (author)The delay caused by an incident depends on many variables. This paper introduces an analytical expression for the delay, describing the location and length of the queue by shockwave theory. As long as the congestion remains on the same link, delay is proportional to the square of the duration, even in case the outflow is reduced by a junction...conference paper 2010
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Knoop, V.L. (author), Snelder, M. (author), Van Zuylen, H.J. (author), Hoogendoorn, S.P. (author)Literature proposes link-based indicators as predictors of the delay caused by a blockade on a particular link. This paper cross-compares these indicators and compares them with the result of a full simulation. The indicators predict different links to be vulnerable. Furthermore, the indicators do not provide a good indication of the delay of a...conference paper 2010
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Knoop, V.L. (author), Snelder, M. (author), Van Zuylen, H.J. (author), Hoogendoorn, S.P. (author)It is computationally expensive to find out where vulnerable parts in a network are. In literature a variety of methods were introduced that use relatively simple selection criteria (measured in real-life or calculated in a traffic simulator) to pre-determine the seriousness of the delays caused by the blocking of that link and thereafter...conference paper 2010
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- Knoop, V.L. (author), Hoogendoorn, S.P. (author), van Arem, B. (author) conference paper 2010
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- Knoop, V.L. (author), Bell, M.G.H. (author), Van Zuylen, H.J. (author) conference paper 2010
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Knoop, V.L. (author), Van Lint, J.W.C. (author), Hoogendoorn, S.P. (author)With current techniques, traffic monitoring and control is a data intensive process. Network control on a higher level, using high level variables, can make this process less data demanding. The macroscopic fundamental diagram relates accumulation, i.e. the number of vehicles in an area, to the network performance, but only holds for situations...conference paper 2011
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Van Lint, J.W.C. (author)An excess number of vehicles in a traffic network will reduce traffic performance. This reduction can be avoided by traffic management. In particular, traffic can be routed such that the bottlenecks are not oversaturated. The macroscopic fundamental diagram provides the relation between the number of vehicles and the network performance. One can...conference paper 2012
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Shiomi, Y. (author), Buisson, C. (author)Lane changes are an important aspect of freeway flow. Most lane change models are microscopic, describing whether individual vehicles/drives will change lanes, and hence are calibrated microscopically. Macroscopic validation often is restricted to the distribution of vehicles across lanes. To the best of our knowledge, no systematic analysis has...conference paper 2012
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Shiomi, Y. (author), Buisson, C. (author)Since lane changes influence traffic operations, it is useful to know their frequency for various conditions. This paper studies the number of lane changes as function of the roadway characteristics. Two sites are studied, for which individual lane change data is available. The paper shows that the most constant measure is the lane change rate,...conference paper 2012
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Knoop, V.L. (author), Hoogendoorn, S.P. (author), Shiomi, Y. (author), Buisson, C. (author)Lane changes are an important aspect of freeway flow. Most lane change models are microscopic, describing whether individual vehicles/drives will change lanes, and hence are calibrated microscopically. Macroscopic validation often is restricted to the distribution of vehicles across lanes. To the best of our knowledge, no systematic analysis has...conference paper 2012
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- Schakel, W.J. (author), Knoop, V.L. (author), Van Arem, B. (author) conference paper 2012
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- Goni Ros, B. (author), Knoop, V.L. (author), Van Arem, B. (author), Hoogendoorn, S.P. (author) conference paper 2012
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Knoop, V.L. (author), Van Lint, J.W.C. (author), Kester, L. (author), Passchier, I. (author), Vries, J. (author)Congestion is a major problem in large urbanised areas. Intelligent Transport Solutions aim to reduce this problem. Generally, traffic is monitored using sensors, this data is processed, a traffic state is estimated and a control measure is computed and implemented. The availability and quality of the data and the processing time of the...conference paper 2012