Fak. 5 Verkehrs- und Maschinensysteme

1182 Items

Recent Submissions
Methodik zur Bewertung von Flugverfahren hinsichtlich Fluglärm und weiteren Kriterien

Müller, Marvin ; Strümpfel, Christoph (2019-01)

Geänderte Betriebsverfahren an Flughäfen können für Bewohner von flughafennahen Gebieten verminderten Fluglärm und verbesserte Luftqualität bedeuten, während in anderen Gebieten im Umkreis von Flughäfen gegensätzliche Effekte zu beobachten sind. Folglich ist an Flughäfen, insbesondere jenen in Industrieländern, ein massiver Interessenkonflikt während des Flugbetriebs und in Hinblick auf Änderun...

Sparse reduced-order modelling: sensor-based dynamics to full-state estimation

Loiseau, Jean-Christophe ; Noack, Bernd R. ; Brunton, Steven L. (2018-04-06)

We propose a general dynamic reduced-order modelling framework for typical experimental data: time-resolved sensor data and optional non-time-resolved particle image velocimetry (PIV) snapshots. This framework can be decomposed into four building blocks. First, the sensor signals are lifted to a dynamic feature space without false neighbours. Second, we identify a sparse human-interpretable non...

Optimal Evacuation Solutions for Large-Scale Scenarios

Dressler, Daniel ; Flötteröd, Gunnar ; Lämmel, Gregor ; Nagel, Kai ; Skutella, Martin (2011)

Evacuation, the process of moving people out of potentially dangerous areas, is a key response to many threats. Planning such an evacuation is therefore important, especially in large-scale emergencies, where routing becomes non-trivial. This paper deals with the optimization and simulation of the evacuation process. We draw our data from the study of the city of Padang in Indonesia, with its h...

Large Scale Microscopic Evacuation Simulation

Lämmel, Gregor ; Rieser, Marcel ; Nagel, Kai (2009)

The evacuation of whole cities or even regions is an important problem, as demonstrated by recent events such as evacuation of Houston in the case of Hurricane Rita or the evacuation of coastal cities in the case of Tsunamis. A robust and flexible simulation framework for such large-scale disasters helps to predict the evacuation process. Existing methods are either geared towards smaller probl...

Emergency Preparedness in the Case of a Tsunami—Evacuation Analysis and Traffic Optimization for the Indonesian City of Padang

Lämmel, Gregor ; Rieser, Marcel ; Nagel, Kai ; Taubenböck, Hannes ; Strunz, Günter ; Goseberg, Nils ; Schlurmann, Thorsten ; Klüpfel, Hubert ; Setiadi, Neysa ; Birkmann, Jörn (2009)

The “Last-Mile Evacuation” research project develops a numerical last mile tsunami early warning and evacuation information system on the basis of detailed earth observation data and techniques as well as unsteady, hydraulic numerical modeling of small-scale flooding and inundation dynamics of the tsunami including evacuation simulations in the urban coastal hinterland for the city of Padang, W...

To Adapt or Not to Adapt – Consequences of Adapting Driver and Traffic Light Agents

Bazzan, Ana L. C. ; Oliveira, Denise de ; Klügl, Franziska ; Nagel, Kai (2008)

One way to cope with the increasing traffic demand is to integrate standard solutions with more intelligent control measures. However, the result of possible interferences between intelligent control or information provision tools and other components of the overall traffic system is not easily predictable. This paper discusses the effects of integrating co-adaptive decision-making regarding ro...

Distributed intelligence in pedestrian simulations

Cavens, Duncan ; Gloor, Christian ; Illenberger, Johannes ; Lange, Eckart ; Nagel, Kai ; Schmid, W. A. (2007)

In order to accurately simulate pedestrian behaviour in complex situations, one is required to model both the physical environment and the strategic decision-making of individuals We present a method for integrating both of these model requirements, by distributing the computational complexity across discrete modules. These modules communicate with each other via XML messages. The approach also...

Risk Minimizing Evacuation Strategies under Uncertainty

Lämmel, Gregor ; Klüpfel, Hubert ; Nagel, Kai (2011)

This paper presents results on the simulation of the evacuation of the city of Padang with approximately 1,000,000 inhabitants. The model used is MATSim (www.matsim.org). Three different strategies were applied: shortest path solution, user optimum, system optimum, together with a constraint that moves should reduce risk whenever possible. The introduction of the risk minimization increases the...

Building a minimal traffic model from mobile phone data

Zilske, Michael ; Nagel, Kai (2013)

We investigate setting up a traffic simulation scenario only from a high spatial resolution set of mobile phone trajectories and an OpenStreetMap road network model. Mixed road traffic is modelled as the result of a choice for each user between a simulated congested car mode and a non-congested alternative mode parameterized by its speed.

Probabilistic Traffic Flow Breakdown in Stochastic Car Following Models

Jost, Dominic ; Nagel, Kai (2005)

There is discussion if traffic displays spontaneous breakdown. This paper presents computational evidence that stochastic car following models can have a control parameter that moves the model between displaying and not displaying spontaneous phase separation for some densities. Those phases can be called “laminar” and “jammed”. Models with spontaneous phase separation show three states as a fu...

The Influence of Multi-agent Cooperation on the Efficiency of Taxi Dispatching

Maciejewski, Michał ; Nagel, Kai (2014)

The paper deals with the problem of the optimal collaboration scheme in taxi dispatching between customers, taxi drivers and the dispatcher. The authors propose three strategies that differ by the amount of information exchanged between agents and the intensity of cooperation between taxi drivers and the dispatcher. The strategies are evaluated by means of a microscopic multi-agent transport si...

Towards high-resolution first-best air pollution tolls

Kickhöfer, Benjamin ; Nagel, Kai (2016)

In this paper, an approach is presented to calculate high-resolution first-best air pollution tolls with respect to emission cost factors provided by Maibach et al. (2008). Dynamic traffic flows of a multi-agent transport simulation are linked to detailed air pollution emission factors. The monetary equivalent of emissions is internalized in a policy which is then used as a benchmark for evalua...

Analysis of Berlin's taxi services by exploring GPS traces

Bischoff, Joschka ; Maciejewski, Michał ; Sohr, Alexander (2015)

With current on-board GPS devices a lot of data is being collected while operating taxis. This paper focuses on analysing travel behaviour and vehicle supply of the Berlin taxi market using floating car data (FCD) for one week each in 2013 and 2014. The data suggests that there is generally a demand peak on workday mornings and a second peak over a longer time in the afternoon. On weekends, the...

An Assignment-Based Approach to Efficient Real-Time City-Scale Taxi Dispatching

Maciejewski, Michał ; Bischoff, Joschka ; Nagel, Kai (2016)

This study proposes and evaluates an efficient real-time taxi dispatching strategy that solves the linear assignment problem to find a globally optimal taxi-to-request assignment at each decision epoch. The authors compare the assignment-based strategy with two popular rule-based strategies. They evaluate dispatching strategies in detail in the city of Berlin and the neighboring region of Brand...

Study of car-bicycle safety at signalized intersections from multi-aspects

Liu, Peipei (2019)

Cycling is increasing in popularity in urban areas due to its individual, social and environmental benefits. However, cyclists are among the most vulnerable road users. Especially at intersections, many bicycles collide with passenger cars despite the control of traffic signals. This thesis focuses on car-bicycle safety at signalized intersections. Various factors contribute to the occurrence o...

MATSim-T : Architecture and Simulation Times

Balmer, Michael ; Rieser, Marcel ; Meister, Konrad ; Charypar, David ; Lefebvre, Nicolas ; Nagel, Kai (2009)

Micro-simulations for transport planning are becoming increasingly important in traffic simulation, traffic analysis, and traffic forecasting. In the last decades the shift from using typically aggregated data to more detailed, individual based, complex data (e.g. GPS tracking) andthe continuously growing computer performance on fixed price level leads to the possibility of using microscopic mo...

Electric Taxis in Berlin – Analysis of the Feasibility of a Large-Scale Transition

Bischoff, Joschka ; Maciejewski, Michał (2016)

Battery operated electric vehicles (BEVs) offer the opportunity of running a zero-emission car fleet. However, due to their current range constraints, electric vehicle operations are mainly attractive for inner-city transport, such as the taxi business. This paper is bringing together facts and assumptions about Berlin’s taxi transport and the current conditions of BEVs in Germany to provide th...

User-specific and Dynamic Internalization of Road Traffic Noise Exposures

Kaddoura, Ihab ; Kröger, Lars ; Nagel, Kai (2016)

In this study, a noise internalization approach is presented and successfully applied to a real-world case study of the Greater Berlin area. The proposed approach uses an activity-based transport simulation to compute noise levels and population densities as well as to assign noise damages back to road segments and transport users. Iteratively, road segment and time dependent noise exposure tol...

Modelling Backward Travelling Holes in Mixed Traffic Conditions Using an Agent Based Simulation

Agarwal, Amit ; Lämmel, Gregor ; Nagel, Kai (2016)

A spatial queue model in a multi-agent simulation framework is extended by introducing a more realistic behaviour, i.e. backward travelling holes. Space corresponding to a leaving vehicle is not available immediately on the upstream end of the link. Instead, the space travels backward with a constant speed. This space is named a ‘hole’. The resulting dynamics resemble Newell’s simplified kinema...

Simultaneous internalization of traffic congestion and noise exposure costs

Kaddoura, Ihab ; Nagel, Kai (2017)

This study elaborates on the interrelation of external effects, in particular road traffic congestion and noise. An agent-based simulation framework is used to compute and internalize user-specific external congestion effects and noise exposures. The resulting user equilibrium corresponds to an approximation of the system optimum. For traffic congestion and noise, single objective optimization ...