Inst. Land- und Seeverkehr (ILS)

295 Items

Recent Submissions
Toter Winkel – Herleitung von Problemfeldern und Entwicklung von Maßnahmen bei Unfällen mit rechtsabbiegenden Lkw und geradeaus fahrendem Radverkehr an unfallauffälligen Knotenpunkten in Berlin

Michel, Janina-Charline (2019)

Etwa 50 % der Unfälle mit Radverkehrsbeteiligung in Berlin sind Abbiegeunfälle. Schwerwiegende Unfallfolgen treten häufig dann auf, wenn abbiegende Lkw beteiligt sind. Für den Konflikt sind in den gültigen Planungsrichtlinien bereits einige Maßnahmen zur Entschärfung vorhanden. Die Vielzahl der enthaltenen Maßnahmen zielt jedoch auf die Situation ab, wenn der Rad- (und Kfz-) Verkehr nach dem St...

Numerical prediction of ship manoeuvring performance in waves

Uharek, Sebastian Alexander (2019)

This thesis presents a method to predict rudder manoeuvres of ships in waves, which is purely based on numerical simulations. For this purpose, a mathematical model of Abkowitz type has been expanded to take the forces and moments due to waves into account. Under the assumption that oscillating wave forces and moments of first order do not influence the trajectory of the manoeuvring ship, only ...

Should autonomous shared taxis replace buses? A simulation study

Leich, Gregor ; Bischoff, Joschka (2018)

The introduction of shared autonomous vehicles (SAV) will likely reduce operation cost per vehicle and might thereby allow to enhance conventional public transit systems with numerous small SAVs offering exible ridesharing-like feeder services. These demand-responsive services could replace conventional bus lines limited by their fixed routes and their fixed schedules. This simulation study exp...

Mobility as a service and the transition to driverless systems

Bischoff, Joschka Felix (2019)

On-demand transport modes have developed over the last decades and are now often integrated into Mobility as a Service (MaaS) systems. Their current scope stretches from classical taxi and paratransit services to ride-hailing and ride-sharing and also includes free-floating car sharing systems. In the future, the ongoing trend towards a sharing-economy and improving autonomous driving capabilit...

Agent-based modelling of air transport demand

Grether, Dominik ; Nagel, Kai (2013)

Constraints such as opening hours or passenger capacities influence travel options that can be offered by an airport and by the connecting airlines. If infrastructure, policy or technological measures modify transport options, then the benefits do not only depend on the technology, but also on possibly heterogeneous user preferences such as desired arrival times or on the availability of altern...

Network breakdown “at the edge of chaos” in multi-agent traffic simulations

Rieser, Marcel ; Nagel, Kai (2008)

Traffic is highly influenced by network structure and human behaviour. Small changes in the human behaviour can lead to huge changes in the load of a traffic network. Current transportation models do not, and most of them cannot, research such random behaviour but always calculate a steady state. In our multi-agent transport simulation, we frequently observe seemingly random "network breakdowns...

Preliminary Results of a Multiagent Traffic Simulation for Berlin

Beuck, Ulrike ; Nagel, Kai ; Rieser, Marcel ; Strippgen, David ; Balmer, Michael (2007)

This paper provides an introduction to multi-agent traffic simulation. Metropolitan regions can consist of several million inhabitants, implying the simulation of several million travelers, which represents a considerable computational challenge. We reports on our recent case study of a real-world Berlin scenario. The paper explains computational techniques necessary to achieve results. It turn...

Mind the Gap – Passenger Arrival Patterns in Multi-agent Simulations

Neumann, Andreas ; Kaddoura, Ihab ; Nagel, Kai (2016)

In most studies mathematical models are developed finding the expected waiting time to be a function of the headway. These models have in common that the proportion of passengers that arrive randomly at a public transport stop is less as headway in-creases. Since there are several factors of influence, such as social demographic or regional aspects, the reliability of public transport service a...

Bicycle traffic and its interaction with motorized traffic in an agent-based transport simulation framework

Ziemke, Dominik ; Metzler, Simon ; Nagel, Kai (2018)

Cycling as an inexpensive, healthy, and efficient mode of transport for everyday traveling is becoming increasingly popular. While many cities are promoting cycling, it is rarely included in transport models and systematic policy evaluation procedures. The purpose of this study is to extend the agent-based transport simulation framework MATSim to be able to model bicycle traffic more realistica...

Autonomous vehicles and their impact on parking search

Bischoff, Joschka ; Maciejewski, Michał ; Schlenther, Tilmann ; Nagel, Kai (2018)

Parking is a major constraint for car users and therefore an important factor in mode choice decisions. In this paper we introduce a model to simulate parking search behavior for cars within a multi-agent transport simulation, including full simulation of all steps of parking search, such as walking to and from the vehicle. This is combined with the capabilities of privately owned autonomous ve...

Comparing traffic flow models with different number of “phases”

Wagner, Peter ; Nagel, Kai (2008)

By comparing microscopic traffic flow models with a different number of phases in the context of a simple scenario, the similarities as well as the differences of the various traffic flow models can be discussed. It turns out that there is a certain range of traffic flow conditions, where it is difficult to discern the space-time patterns produced by the different models. However, there are som...

A Model of Risk-Sensitive Route-Choice Behavior and the Potential Benefit of Route Guidance

Illenberger, Johannes ; Flötteröd, Gunnar ; Nagel, Kai (2011)

In this paper, we present a simulation-based investigation of the potential benefit of route-guidance information in the context of risk-sensitive travelers. We set up a simple two-route scenario where travelers are repeatedly faced with risky route-choice decisions. The risk averseness of the travelers is implicitly controlled through a generic utility function. We vary both the travelers' sen...

An improved framework for large-scale multi-agent simulations of travel behaviour

Raney, Bryan ; Nagel, Kai (2006)

We describe a framework for running large-scale multi-agent simulations of travel behaviour. The framework represents each traveller as an individual ‘agent’ that makes independent decisions about its desired use of the transporta- tion system during a typical day. An agent keeps a record of its decisions in a ‘plan’. A plan contains the agent’s schedule of activities it wants to perform during...

The MATSim Network Flow Model for Traffic Simulation Adapted to Large-Scale Emergency Egress and an Application to the Evacuation of the Indonesian City of Padang in Case of a Tsunami Warning

Lämmel, Gregor ; Klüpfel, Hubert ; 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. This paper describes a complex evacuation simulation framework for the city of Pandang, with approximately 1,000,000 inhabitants. Padang faces a high risk of being inundat...

Large-Scale Multi-Agent Simulations for Transportation Applications

Balmer, Michael ; Nagel, Kai ; Raney, Bryan (2004)

In many transportation simulation applications including intelligent transportation systems (ITS), behavioral responses of individual travelers are important. This implies that simulating individual travelers directly may be useful. Such a microscopic simulation, consisting of many intelligent particles (= agents), is an example of a multi-agent simulation. For ITS applications, it would be use...

Income-contingent user preferences in policy evaluation: application and discussion based on multi-agent transport simulations

Kickhöfer, Benjamin ; Grether, Dominik ; Nagel, Kai (2011)

Standard economic policy evaluation allows the realization of projects if the aggregated economic benefit outweighs their costs. The use of one single aggregated welfare measure for evaluating and ranking projects has often been criticized for many reasons. A major issue is that differentiated effects on individuals or subgroups of the population are not taken into consideration. This leads to ...

Generating complete all-day activity plans with genetic algorithms

Charypar, David ; Nagel, Kai (2005)

Activity-based demand generation contructs complete all-day activity plans for each member of a population, and derives transportation demand from the fact that consecutive activities at different locations need to be connected by travel. Besides many other advantages, activity-based demand generation also fits well into the paradigm of multi-agent simulation, where each traveler is kept as an ...

The Role of Spatial Interaction in Social Networks

Illenberger, Johannes ; Nagel, Kai ; Flötteröd, Gunnar (2012)

This article addresses the role of spatial interaction in social networks. We analyse empirical data describing a network of leisure contacts and show that the probability to accept a person as a contact scales in distance with similar to d (-aEuro parts per thousand 1.4). Moreover, the analysis reveals that the number of contacts an individual possesses is independent from its spatial location...

Behavioral Calibration and Analysis of a Large-Scale Travel Microsimulation

Flötteröd, Gunnar ; Chen, Yu ; Nagel, Kai (2011)

This article reports on the calibration and analysis of a fully disaggregate (agent-based) transport simulation for the metropolitan area of Zurich. The agent-based simulation goes beyond traditional transport models in that it equilibrates not only route choice but all-day travel behavior, including departure time choice and mode choice. Previous work has shown that the application of a novel ...

From Earthquake Detection to Traffic Surveillance – About Information and Communication Infrastructures for Smart Cities

Fischer, Joachim ; Redlich, Jens-Peter ; Scheuermann, Björn ; Schiller, Jochen ; Günes, Mesut ; Nagel, Kai ; Wagner, Peter ; Scheidgen, Markus ; Zubow, Anatolij ; Eveslage, Ingmar ; Sombrutzki, Robert ; Juraschek, Felix (2013)

Smart cities use networks of sensors, actuators, and centralized computing clusters to observe physical reality, derive information, and thereby influence citizens and authorities. Smart city applications therefore require three components to work: wireless sensor networks, geo-information systems, and frameworks for distributed analysis of sensor and geo-data. In this paper, we provide an over...