Introducing Data-Format-Dependent Road Network Conversion Techniques -Lessons Learned from the Digital Twin Munich (original) (raw)

Creating an Interactive Urban Traffic System for the Simulation of Different Traffic Scenarios

Applied Sciences

The social and political efforts to fight climate change have contributed to a re-thinking of traffic systems, especially in urban areas under constant transformation. To simulate and visualize planning scenarios of urban traffic systems in a realistic way, the possibilities of virtual 3D environments have regularly been used. The modern potentials of (immersive) virtual reality, however, still require exploration, evaluation, and further development. Using the game engine Unity, an immersive virtual environment was developed to visualize and experience dynamic traffic conditions of a highly dense urban area. The case study is based on the characteristic model of a Central European city (not a representation of a real city), which brings together the specific considerations of urban traffic, such as mirroring the complex interplay of pedestrians as well as individual and public transport. This contribution has an applied methodological focus and considers possibilities as well as di...

Combined Modelling of Multiple Transportation Infrastructure Within 3D City Models and Its Implementation in Citygml 3.0

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020

The development of digital urban twins has led to efforts of multiple cities to gather detailed and highly accurate data on many parts of urban environments, including road and railway infrastructure as well as areas used by pedestrians. This paper presents concepts for representing and segmenting this data semantically, geometrically and topologically ensuring usability for various multimodal applications in the context of digital 3D city models. First, methods for modelling multiple transportation types of several standards such as OpenDRIVE, GDF and INSPIRE are examined, including a discussion of different types of information integration such as functional and topographical representations. Then, concepts proposed to the CityGML Standards Working Group for the CityGML 3.0 Transportation model are presented. This includes detailed methods for modelling multiple transportation modes within a common city model while avoiding redundant geometric representations. A section / intersection concept in combination with links used to model these relations is described. Linear as well as areal models of level crossings, pedestrian crosswalks or areas shared by multiple transportation infrastructure at the same time (e.g. a tramway within a road) are presented. Subsequently, examples and applications that benefit from accurate representations of multiple transportation types are described.

Detailed Streetspace Modelling for Multiple Applications: Discussions on the Proposed CityGML 3.0 Transportation Model

ISPRS International Journal of Geo-Information

In the context of smart cities and digital twins, three-dimensional semantic city models are increasingly used for the analyses of large urban areas. While the representation of buildings, terrain, and vegetation has become standard for most city models, detailed spatio-semantic representations of streetspace have played a minor role so far. This is now changing (1) because of data availability, and (2) because recent and emerging applications require having detailed data about the streetspace. The upcoming version 3.0 of the international standard CityGML provides a substantially updated data model regarding the transportation infrastructure, including the representation of the streetspace. However, there already exist a number of other standards and data formats dealing with the representation and exchange of streetspace data. Thus, based on an extensive literature review of potential applications as well as discussions and collaborations with relevant stakeholders, seven key mode...

Transforming GIS Data into Functional Road Models for Large-Scale Traffic Simulation

IEEE Transactions on Visualization and Computer Graphics, 2000

There exists a vast amount of geographic information system (GIS) data that models road networks around the world as polylines with attributes. In this form, the data is insufficient in and of itself for applications such as simulation and 3D visualization -tools which will grow in power and demand as sensor data becomes more pervasive and as governments try to optimize their existing physical infrastructure. In this paper, we propose an efficient method for enhancing a road map from a GIS database to create a geometrically and topologically consistent 3D model to be used in real-time traffic simulation, interactive visualization of virtual worlds, and autonomous vehicle navigation. The resulting model representation also provides important road features for traffic simulations, including ramps, highways, overpasses, legal merge zones, and intersections with arbitrary states, and it is independent of the simulation methodologies. We test the 3D models of road networks generated by our algorithm on real-time traffic simulation using both macroscopic and microscopic techniques.

Preparation of Digital Maps for Traffic Simulation; Part 1: Approach and Algorithms

2005

Traffic simulations are an accepted tool for investigations on road traffic and used widely within the traffic science community. Modern computer systems are fast enough to model and simulate traffic within large areas at a microscopic scale regarding each vehicle, replacing macroscopic simulations in most cases. Although microscopic traffic simulations offer better quality than macroscopic ones, they also need additional data to describe the modelled road networks. A street's lanes are modelled explicitly within microscopic simulations and in most cases also the connections between their lanes over junctions.

A development of a traffic simulator for urban road networks: AVENUE

1994

This study develops AVENUE (an Advanced & Visual Evaluator for road Networks in Urban arEas). AVENUE incorporates a driver's route choice model and a traffic flow model that can reproduce over-saturated network conditions as well as under-saturated ones. The development of AVENUE is based on the object-oriented programming which affords flexible modifications to users' requirements and graphical environment for easy operations. This model was validated through an application to the Kinshicho area in Tokyo.

Three-dimensional Urban Traffic Simulation with ITranS

incrediblescrobbies.com

Urban traffic planning has a fundamental role in our society, for it improves the use of traffic roads and optimizes the flow of both vehicles and pedestrians. Nowadays, different mathematical models exist to facilitate this activity. They are virtually built and computer simulated and are basically categorized in two groups: macro and micro-simulation models. The first presents traffic as flow values whereas the second specifies traffic by representing each vehicle. The primary goal of this work was to develop a singular traffic micro-simulation tool using a desktop Virtual Reality (VR) interface and improved steering behaviours. This tool will serve as a basis for the future development of a transit simulator with a distributed architecture.

Opus: An open platform for urban simulation

2005

Research in transportation modelling and planning has made significant advances over the past decade along four axes of innovation, within a unifying theme of modelling land use and transportation choices at the individual level. The first of these axes is in integrated land use and transportation modelling, motivated by the need to assess major transportation investments and their effects on urban development and on the environment. Over the past decade, several research projects have been developing new platforms for integrated land use and transportation modelling, including ALBATROSS

Urban Modelling and Visualization Tools for Urban Transportation Systems – Examples from Two Living-Lab Projects in Gothenburg

2016

Abstract: Purpose: Within transport projects there is a growing demand for urban modelling and advanced visualization methods. This paper reflects upon visualizations techniques used in two transdisciplinary projects studying implementation of transport solutions in Gothenburg. Involvement of many stakeholders and efficient dialogue tools were essential to support communication in the transdisciplinary environment. Sendsmart and Go:Smart projects (2012-2014) aimed at developing and testing innovative sustainable solutions for urban transportation with a focus on freight (Sendsmart) and passenger transport (Go:Smart). They were developed as an important municipal attempt to create better conditions for sustainable urban travel in the city. Research Approach: Both projects turned out to become a living laboratory for visualization implementation and engaged groups of key stakeholders from the academia, industry, city of Gothenburg, and the regional and national organizations. These pr...