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Calvert, S.C. (author), Klunder, G.A. (author), Steendijk, J.L.L. (author), Snelder, M. (author)A Field-Operational-Test (FOT) with CACC vehicles and wireless communication with intelligent intersections on arterial roads was performed in autumn 2018, initiated by the Province of Noord-Holland in The Netherlands. The goal of the pilot was to demonstrate the feasibility of CACC platooning and V2I/I2V (infrastructure-tovehicle) communication...article 2020
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Calvert, S.C. (author), Taale, H. (author), Snelder, M. (author), Hoogendoorn, S.P. (author)In a bid to cost-effectively tackle congestion, traffic management is often seen as a key option to utilise road capacity. Prior to the application of traffic management measures, a-priori analysis allows the effectiveness of measures to be judged and where necessary adapted. However, current approaches do this without considering the effects of...article 2018
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- Hauck, M. (author), Giezen, C. (author), Calvert, S.C. (author), Keijzer, E.E. (author), de Vos-Effting, S.E. (author), van Vliet, D. (author), Voskuilen, J. (author) conference paper 2017
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Calvert, S.C. (author), Rypkema, J. (author), Holleman, B. (author), Azulay, D. (author), de Jong, A. (author)This study investigates different methods to visualise uncertainty in static representations of probabilistic traffic models predictions on road-networks. Although various graphical cues may be used to represent uncertainty it is not a priori clear which of them are most suited for this purpose, since their legibility, intelligibility and the...article 2017
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Calvert, S.C. (author), Snelder, M. (author)Major and minor disturbances can have a considerable impact on the performance of road networks. In this respect, resilience is con-sidered as the ability of a road section to resist and to recover from disturbances in traffic flow. In this contribution, an indicator is pre-sented, the Link Performance Index for Resilience (LPIR), which eval...article 2017
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Calvert, S.C. (author), Wilmink, I.R. (author), Soekroella, A.M.G. (author), van Arem, B. (author)Abstract—With increasing numbers of vehicles using low level automation and higher level automation expected in the future, significant effects are expected on traffic flow. Despite much simulation and driving simulator research on SAE level 1 vehicles, there remain many questions in regard to the effects of the systems on traffic flow. The...conference paper 2016
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Calvert, S.C. (author), Snelder, M. (author)Traffic is affected by a wide range of variables. An influential and commonly occurring variable on traffic flow is the weather. Weather conditions affect both traffic demand as well as road capacity and in doing so also affect the traffic fluency, or rather the ability of traffic to maintain a certain level-of-service. In this contribution it...article 2016
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Snelder, M. (author), Calvert, S.C. (author), Bakri, T. (author), Heijligers, B.M.R. (author), van Huis, J.R. (author)Het beste routekeuze- en vertrektijdstipadvies is gebaseerd op betrouwbare reistijd-voorspellingen. Een nieuwe ontwikkeling is een raamwerk dat plaats biedt aan verschillende voorspelmethoden waaruit de 'hypothesemanager' de juiste methoden combineert voor dát tijdstip, op die locatie onder die verwachte weersomstandighe-den. Dit raamwerk is...article 2016
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Calvert, S.C. (author), Snelder, M. (author), Taale, H. (author), van Wageningen-Kessels, F.L.M. (author), Hoogendoorn, S.P. (author)In this contribution a model-based analysis of the application of bounded acceleration in traffic flow is considered as a cause for the capacity drop. This is performed in a Lagrangian formulation of the kinematic wave model with general vehicle specific characteristics. Unconstrained overtaking is presumed, which allows a demonstration to be...conference paper 2015
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Calvert, S.C. (author), Snelder, M. (author), Bakri, T. (author), Heijligers, B. (author), Knoop, V.L. (author)Heavily used urban networks remain a challenge for travel time prediction because traffic flow is rarely homogeneous and is also subject to a wide variety of disturbances. Various models, some of which use traffic flow theory and some of which are data driven, have been developed to predict traffic flow and travel times. Many of these perform...article 2015
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van Stralen, W.J.H. (author), Calvert, S.C. (author), Molin, E.J.E. (author)Weather conditions are widely acknowledged to contribute to the occurrence of congestion on motorway traffic by influencing both traffic supply and traffic demand. To the best of our knowledge, this is the first paper that explicitly integrates supply and demand effects in predicting the influence of adverse weather conditions on the probability...article 2015
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Calvert, S.C. (author)In de Economische Wegwijzer van TLN en EVO staan de duurste files voor het vrachtverkeer. Na een daling van schade door weguitbreidingen is er nu sprake van een toename. Minister Schultz bracht diverse wensen van TLN en EVO dichter bij realisatie.article 2015
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Calvert, S.C. (author), Taale, H. (author), Snelder, M. (author), Hoogendoorn, S.P. (author)In probabilistic traffic models, consideration of stochasticity in the dynamics of traffic gives a closer representation of a traffic system in comparison to that of a deterministic approach. Monte Carlo simulation is a broadly accepted method to consider variations in traffic within modelling. In this contribution, the possibility of increasing...article 2014
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Calvert, S.C. (author)De Economische Wegwijzer wordt jaarlijks uitgebracht door TLN in samenwerking met EVO. In de Economische Wegwijzer staat een overzicht van de duurste files van Nederland, vanuit het oogpunt van het vrachtverkeer. Files veroorzaken niet alleen grote ergernis voor het vrachtverkeer, maar door de vertragingen zorgen ze ook voor financiële schade....report 2014
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van Erp, J.B.F. (author), van Maanen, P.P. (author), Venrooij, W. (author), Calvert, S.C. (author), van Beurden, M.H.P.H. (author)Intuitive User Interaction aims to develop the next generation user interfaces required to grant experts and laymen access to complex models and large amount of data in design and decision processes and therewith to contribute to the ambition to broaden the applicability of models. Important topics include advanced methods to visualize...report 2014
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Calvert, S.C. (author), Snelder, M. (author)The influence of rain on motorways is proven degradative for traffic flow. This degradation can be seen from lower capacity and speed values. The effect of rain is however a highly stochastic one. Although relationships between rain intensity and capacity reduction have been offered, these show a large spread in quantitative outcomes. In this...conference paper 2013
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Snelder, M. (author), Minderhoud, M.M. (author), Calvert, S.C. (author)In Amsterdam is het eerste real time verkeersmodel voor plezier- en beroepsvaart ontwikkeld voor de Amsterdamse grachten. In de Amsterdamse grachten neemt de laatste jaren het aantal boten voor rondvaart, goederenvervoer en pleziervaart toe, dus ook de daarbij behorende drukte en overlast. Stichting Waternet, verantwoordelijk voor het in goede...conference paper 2013
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Calvert, S.C. (author), Taale, H. (author), Snelder, M. (author), Hoogendoorn, S.P. (author)In traffic models certain presumptions are often made to simplify the complex systems that rule the world of traffic flow. This is necessary as not every variable can be considered. Furthermore, it is commonplace that equilibrium states are sought that give a good average, or rather deterministic, representation of the dynamics of traffic. Such...conference paper 2012
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Duijnisveld, M.A.G. (author), Peijs, L. (author), Calvert, S.C. (author)In december 2011 start de uitvoering van het eerste traject van het project weguitbreiding Schiphol – Amsterdam – Almere (SAA), te weten de verbreding van de A10 oost en de A1 tussen knooppunt Watergraafsmeer en knooppunt Diemen. Bij de aanbesteding van de SAA-wegwerkzaamheden geldt als één van de kritische succesfactoren de mate waarin...conference paper 2012
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Calvert, S.C. (author), Taale, H. (author), Snelder, M. (author), Hoogendoorn, S.P. (author)In the past decade an increase in research regarding stochasticity and probability in traffic modelling has occurred. The realisation has grown that simple presumptions and basic stochastic elements are insufficient to give accurate modelling results in many cases. This paper puts forward a strong argument for the further development and...conference paper 2012
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