Vienna, Austria
Vienna, Austria

Time filter

Source Type

Calvo F.,University of Granada | De Ona J.,University of Granada | Aran F.,University of Granada | Nash A.,Vienna Transport Strategies
Transportation Research Record | Year: 2013

The development of new transport systems often leads to demographic and socioeconomic changes in the implementation area. The extent and the type of such impacts vary, however, and can depend on existing settlement patterns, socioeconomic conditions, and project objectives. For a better understanding of such impacts better, this paper examines the effects of two new light rail transit lines (ML1 and ML2) in Madrid, Spain. The two lines were planned to serve different functions, and the service areas have different land use characteristics. ML1 was designed to help promote urban development in a lightly settled area, while ML2 was designed to encourage public transport in an already developed area. As expected, the analysis showed that the impacts of these two lines were quite different. Along ML1, much new development took place, and large increases occurred in the population. Along ML2, land use and population remained largely unchanged. This finding demonstrates the critical importance of integrated transport and land use planning in the development of cities.


Naegeli L.,ETH Zurich | Weidmann U.,ETH Zurich | Nash A.,Vienna Transport Strategies
Transportation Research Record | Year: 2012

Tram-train systems combine the best features of streetcars with regional rail. These systems make direct connections between town centers and surrounding regions possible by physically linking existing regional heavy rail networks with urban tram networks. The tram-train approach offers many advantages by using existing infrastructure to improve regional transit. However, the use of two dissimilar networks and the mixing of heavy rail and tram operations increase complexity and often require compromise solutions. The research surveyed existing systems to identify requirements for successfully introducing tram-train systems. The requirements include network design, city layout, population density, and physical factors (e.g., platform heights). One of the most important factors is cooperation between many actors, including transit operators, railways, and cities. Tram-train systems are complex but can provide significant benefits in the right situations. The paper describes tram-train systems, the key requirements for successful systems, and conclusions.


Schneebeli H.,VBG Verkehrsbetriebe Glattal AG | Nash A.,Vienna Transport Strategies | Scherer M.,ETH Zurich
Transportation Research Record | Year: 2010

The Glattalbahn is an innovative new public transport system serving the rapidly urbanizing suburbs of Zurich, Switzerland. The service combines features of traditional urban and suburban transport. In the city, it operates like a streetcar using Zurich's tram network, but in suburban communities, it operates at higher speeds, with longer stop spacing-more like regional rail service. The Glattalbahn incorporates the latest light rail transport best practices, including a broad community-planning process, coordinated transport and land use planning, continuous facade-to-facade planning, and the use of high-quality components, to reduce life-cycle costs and increase attractiveness. Three routes operate on the newly built infrastructure linking Zurich to the airport. The project cost 652 million Swiss francs (U. S. $602 million). The Glattalbahn has been successful by exceeding its patronage estimates, encouraging significant development, and generating highly positive ratings from customers and the community.


Fink O.,ETH Zurich | Nash A.,Vienna Transport Strategies | Weidmann U.,ETH Zurich
Transportation Research Record | Year: 2013

European passenger rail systems are massively interconnected and operate with very high frequency. The effects of single-component failures on these types of systems can significantly affect technical and operational reliability. Today advanced diagnostic tools with broad functionalities are being added to systems and system components. These tools control the operation of, support the maintenance of, and monitor the highly sophisticated and interconnected components. A set of diagnostic event data from a passenger train exterior door system was used to predict the occurrence of events that might evolve into operational disruptions that affect train operation and therefore railway reliability. This approach used a neural network algorithm with dynamic temporal behavior (the echo state network) in combination with principal component analysis. The proposed approach exhibited a prediction accuracy of up to 99%.


Herrigel S.,ETH Zurich | Laumanns M.,IBM | Nash A.,Vienna Transport Strategies | Weidmann U.,ETH Zurich
Transportation Research Record | Year: 2013

Today many European railway networks are operating near capacity. Developing timetables for these dense and often highly congested networks is becoming increasingly difficult. Several algorithmic approaches for solving timetabling problems have been developed in recent years, but the problem size, computational complexity, and lack of transparent interfaces for planners slow down adoption of these approaches in practice. This research proposed an iterative method based on train hierarchies to solve large periodic timetabling problems. The proposed method added a new group of trains to the schedule in each step of the process while holding trains added in previous steps fixed within a specified time interval. A case study with real-world data was used to analyze the influence of the number of decomposition steps and time interval on computation time and timetable quality. The results showed that setting parameters to a compromise between the extremes of a purely sequential or a purely simultaneous timetable planning approach was very effective at reducing computation time while still providing optimal or close-to-optimal timetables.


Naegeli L.,ETH Zurich | Orth H.,ETH Zurich | Weidmann U.,ETH Zurich | Nash A.,Vienna Transport Strategies
Transportation Research Record | Year: 2013

Public transport is a very efficient way to handle large traffic flows in urban areas. At the same time, and especially in Europe, nonmotorized transport is being promoted as a further environmentally friendly and healthful way of urban mobility. This push includes the introduction and extension of separate lanes to increase safety and convenience of bikers and pedestrians. However, most cities have limited space for expanding streets and roads, and this limitation can lead to a conflict over the different uses. A clear understanding of the impacts of these changes on public transport is critical. A quick assessment model was developed to analyze the impact of changes to roadway design and policy that can affect public transport services. The model was developed to help public transport operator Verkehrsbetriebe Zürich in Zurich, Switzerland, assess changes quickly; these changes included the elimination of separate rights-of-way or the introduction of slow zones. The model will also help to explain the impacts of these changes to nontechnical audiences. The model uses a series of analytical calculations to analyze the main relationships between key public transport inputs and outputs. The model was validated with data from Zurich's tram and bus network. The case studies examined the influence of the reduction of separate rights-of-way, the expansion of 30 km/h zones, and the changes to stop distances on public transport operations.


Nash A.,Vienna Transport Strategies
19th Intelligent Transport Systems World Congress, ITS 2012 | Year: 2012

GreenCityStreets.com is an Internet application designed to test the use of ITS techniques in improving transport planning. It consists of a game, best practices library and social network. The game and best practices are designed to educate residents, while the social network allows them to suggest ideas for improving transport. The application was developed and tested in Vienna during 2011. The application was successful technically, but failed to attract a critical mass of users. The paper presents lessons learned for future projects. The application is on line at www.greencitystreets.com.

Loading Vienna Transport Strategies collaborators
Loading Vienna Transport Strategies collaborators