Inst. Land- und Seeverkehr (ILS)

334 Items

Recent Submissions
The effect of unexpected disruptions and information times on public transport passengers: a simulation study

Müller, Sebastian Alexander ; Leich, Gregor ; Nagel, Kai (2020)

This paper deals with the simulation of unexpected disruptions in public transport in the agent-based transport simulation framework of MATSim. A replanning logic for public transport passengers is implemented so passengers can be informed about and react to a disruption and use an alternative route. An unexpected disruption of an underground line in Berlin is simulated to analyze how passenger...

The impact of pricing and service area design on the modal shift towards demand responsive transit

Kaddoura, Ihab ; Leich, Gregor ; Nagel, Kai (2020)

In this study, an agent-based transport simulation is used to look into different design concepts for demand responsive transit (DRT). In different simulation experiments for a real-world case study of the Greater Berlin area, the DRT service area is either set to the inner-city center area or the entire city area, and the DRT pricing scheme is varied. The existing simulation framework is exten...

Impact assessment of autonomous DRT systems

Bischoff, Joschka ; Führer, Karoline ; Maciejewski, Michal (2019-11-28)

The market entrance of shared autonomous vehicles (SAV) may have disruptive effects on current transport systems and may lead to their total transformation. For many small and medium-sized cities, a full replacement of public transport services by these systems seems to be possible. For a transport system operator, such a system requires a bigger fleet of vehicles than before, however, vehicles...

Electrification of Urban Freight Transport – a Case Study of the Food Retailing Industry

Martins-Turner, Kai ; Grahle, Alexander ; Nagel, Kai ; Göhlich, Dietmar (2020)

Decarbonisation is a major challenge for the coming decades, for all industries, including the transport sector. Battery electric vehicles are a potential solution for the transport sector to reduce its carbon impact. Asides from the question whether there is sufficient supply of electric vehicles for freight transport, it is also unclear whether battery-powered trucks meet the practical requir...

Virtual Worlds—Real Decisions: Model- and Visualization-based Tools for Landscape Planning in Switzerland

Walz, Ariane ; Gloor, Christian ; Bebi, Peter ; Fischlin, Andreas ; Lange, Eckart ; Nagel, Kai ; Allgöwer, Britta (2008-05)

Prominent construction projects in Switzerland, such as the Sawiris luxury resort in Andermatt planned by Orascom Hotels & Development, Cairo (Egypt), or the idea of a hotel and apartment tower at Schatzalp, Davos, demonstrate how rapidly Alpine landscapes may undergo major changes. Decisions on whether or not such changes are supported by policymakers should be based on the best information av...

Using Multi-Agent Transport Simulations to Assess the Impact of EV Charging Infrastructure Deployment

Márquez-Fernández, Francisco J. ; Bischoff, Joschka ; Domingues-Olavarría, Gabriel ; Alaküla, Mats (2019-08-08)

Over the last two decades, electrification has gained importance as a means to decarbonise the transport sector. As the number of Electric Vehicles (EVs)increases, it is important to consider broader system aspects as well, especially when deciding the type, coverage, size and location of the charging infrastructure required. In this article, a Multi-Agent model depicting long distance transpor...

Integrated Transport Planning: From Supply- to Demand-Oriented Planning. Considering the Benefits

Schwedes, Oliver ; Hoor, Maximilian (2019-10-24)

The idea of integrated transport planning is widely accepted in the research community as well as in the field of transport policy. However, the actual implementation is still lagging behind. Acknowledging the gap between concept and reality, the benefits of a demand-oriented approach have to be reconsidered by the various stakeholders in politics, the economy, planning and civil society. In or...

Using MATSim as a Component in Dynamic Agent-Based Micro-Simulations

Singh, Dhirendra ; Padgham, Lin ; Nagel, Kai (2019-05-13)

This paper discusses use of the widely used transport simulator, MATSim, as one component in a large complex agent based microsimulation where dynamic changes in the environment require the agents to be reactive as well as goal directed. We describe a number of refinements to MATSim that have been made to facilitate its use within our deployed wildfire evacuation applications, as well as some t...

Simulated dynamic pricing for transport system optimization

Kaddoura, Ihab (2019)

This thesis investigates the use of simulated dynamic pricing for the optimization of transport systems. Pricing strategies are developed and incorporated into an agent-based transport simulation framework which allows for a real-world application, complex user reactions and a detailed analysis of the pricing scheme’s effects, including person-specific wins and losses. A mechanistic approach is...

Model of aerodynamics and heat transfer of a turbocharger

Gao, Xunan (2019)

Heat transfer has a non-negligible effect on the measurement of turbocharger performance. This leads to an underestimate of the compressor efficiency as well as an overestimate of the turbine efficiency and eventually deteriorates the matching of a turbocharger to an engine. The present work deals with the modeling of aerodynamics and heat transfer of a turbocharger. It aims to quantify the hea...

Effects of user adaption on traffic-responsive signal control in agent-based transport simulations

Thunig, Theresa ; Nagel, Kai (2019-10-28)

All traffic-responsive approaches have in common that they directly influence waiting times of travelers (users) at intersections and, thereby, influence user reaction, e.g. route choice. On the other hand, users route choice directly influences sensor data and, thereby, the signal settings controlled by traffic-responsive signals. Thus, the interference of route choice and traffic-responsive s...

Towards a multi-agent based modeling approach for air pollutants in urban regions

Hülsmann, Friederike ; Gerike, Regine ; Kickhöfer, Benjamin ; Nagel, Kai ; Luz, Raphael (2011)

Urban environments are often associated with high traffic density. Especially road traffic is a major source for air pollution in cities. The cause-and-effect chain from the traffic activity towards the concentration of air pollutants is complex. Modeling the outcome needs a lot of inputs in terms of methodology and data. Against this background, an approach is developed that links the agent-ba...

A Microscopic Simulation Approach for Optimization of Taxi Services

Maciejewski, Michał ; Nagel, Kai (2013)

This paper presents a simulation platform along with several on-line dispatching algorithms developed in order to optimize taxi services. First, the issue of simulation-based optimization of modern transport services, especially taxi services, is presented. Next, the proposed approach to microscopically simulate taxi services is explained, followed by a description of the on-line taxi dispatchi...

Investigation of Energy Efficient Power Coupling Steering System for Dual Motors Drive High Speed Tracked Vehicle

Zhai, Li ; Huang, Hong ; Sun, Tianmin ; Wang, Qiannan (2016-12-27)

This paper presents an energy efficient power coupling steering system for dual motors drive high speed tracked vehicle. The system consists of a new type of center steering motor, two electromagnetic (EM) clutches, two planetary gear couplers, and two propulsion motors. The motor torque and power required by dynamic steering with different steering radiuses for dual motors drive high speed tra...

Causes, consequences and countermeasures of overtaking accidents on two-lane rural roads

Richter, Thomas ; Ruhl, Stephan ; Ortlepp, Jörg ; Bakaba, Emmanuel (2017)

Overtaking accidents have one of the most serious consequences of accidents on German rural roads. The aim of this project was to determine the infrastructural and traffic related variables which influence the occurrence and consequences of overtaking accidents as well as the overtaking behavior of drivers. Finally, diverse correlations between operational and infrastructural road characteristi...

Turning accidents between cars and trucks and cyclists driving straight ahead

Richter, Thomas ; Sachs, Janina (2017)

Two projects contain the conflict between turning vehicles and straight ahead driving cyclists. One out of four of all accidents in Germany are accidents with bicycles. In Addition, most of the accidents end with heavy or deathly personal injury. Especially accidents with right turning trucks and straight ahead driving cyclist are on one hand rarely but on the other hand very dangerous because ...

Entwicklung eines regionalen, agentenbasierten Verkehrssimulationsmodells zur Analyse von Mobilitätsszenarien für die Region Ruhr

Ziemke, Dominik ; Kaddoura, Ihab ; Agarwal, Amit (2019-04-17)

Durch sich verändernde Lebensmuster, neue Strukturen in der Arbeitswelt sowie weiterhin ungelöste Fragestellungen bzgl. Umweltwirkungen des Verkehrssektors stehen die Verkehrssysteme der Städte und Regionen vor großen Herausforderungen. Diese werden begleitet durch technische Neuerungen wie autonome Fahrzeuge und neue Antriebstechnologien. In der Region Ruhr bietet sich im Zuge der Umgestaltung...

Reverse-engineering of the rule-of-half in order to retrofit an assessment procedure based on resource consumption

Nagel, Kai ; Kickhöfer, Benjamin ; Winter, Martin (2015)

The German evaluation procedure for the Federal Transport Infrastructure Plan (‘Bun-desverkehrswegeplan’) is a large-scale and comprehensive modeling, simulation, and eval-uation effort. An important component of the evaluation procedure is a cost-benefit analy-sis, based on the concept of resource consumption. This concept means that new transport infrastructure causes changes in the consumpti...

Using common graphics hardware for multi-agent traffic simulation with CUDA

Strippgen, David ; Nagel, Kai (2010-05-16)

Today's graphics processing units (GPU) have tremendous resources when it comes to raw computing power. The simulation of large groups of agents in transport simulation has a huge demand of computation time. Therefore it seems reasonable to try to harvest this computing power for traffic simulation. Unfortunately simulating a network of traffic is inherently connected with random memory access....

Der Transportlogistikdienstleister in einem Multiagentenmodell des Güterverkehrs

Schröder, Stefan ; Zilske, Michael ; Liedtke, Gernot ; Nagel, Kai (2011)

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