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Publikation Simulation of policies for automated ride-hailing and ride-pooling services(05.01.2025) Kagho, Grace; Balac, Milos; van Eggermond, Michael; Erath, AlexanderAutomated vehicles are becoming more prevalent, and the disruption they would cause in combination with ride-hailing and ride-pooling services could be tremendous. Therefore, this study investigates the impacts of ride-hailing and ride-pooling automated fleets in two Swiss cities, Chur and Zurich, and potential policy measures to steer their operations towards more sustainable solutions. We employ the results of the stated preference survey and combine the estimated mode-choice and car ownership model results with the agent-based simulation, MATSim, to simulate the impacts of various scenarios. We find that automated ride-hailing (aRH) and automated ride-pooling (aRP) services do not seem to be competing for the same demand. In general, these services would lead to a reduction in total travel time but an increase in total vehicle distance, which is more substantial in transit-oriented Zurich than in car-oriented Chur. Furthermore, we found that even though the proposed policies increased vehicle occupancy, they did not manage to overcome the increase in VKT, signaling the need for more targeted policies and operational strategies. Finally, we provide recommendations for transport policy and future research based on our findings.04B - Beitrag KonferenzschriftPublikation Simulation of policies for automated ride-hailing and ride-pooling services(ETH Zürich, 01.08.2025) Kagho, Grace; Balac, Milos; van Eggermond, Michael; Erath, AlexanderAutomated vehicles are becoming more prevalent, and the disruption they would cause in combination with ride-hailing and ride-pooling services could be tremendous. Therefore, this study investigates the impacts of ride-hailing and ride-pooling automated fleets in two Swiss cities, Chur and Zurich, and potential policy measures to steer their operations towards more sustainable solutions. We employ the results of the stated preference survey and combine the estimated mode-choice and car ownership model results with the agent-based simulation, MATSim, to simulate the impacts of various scenarios. We find that automated ride-hailing (aRH) and automated ride-pooling (aRP) services do not seem to be competing for the same demand. In general, these services would lead to a reduction in total travel time but an increase in total vehicle distance, which is more substantial in transit-oriented Zurich than in car-oriented Chur. Furthermore, we found that even though the proposed policies increased vehicle occupancy, they did not manage to overcome the increase in VKT, signaling the need for more targeted policies and operational strategies. Finally, we provide recommendations for transport policy and future research based on our findings.05 - Forschungs- oder ArbeitsberichtPublikation Comparing Q347 development and regionalization using recent data in two Swiss cantons(09.11.2024) Dups, Yanick; Lebrenz, HenningIn Switzerland, low flows are characterized by the discharge level corresponding to a 95% exceedance probability on a ten-year average flow duration curve, referred to as Q347. This threshold not only has significant implications for planning but also requires authorities to adjust the operation of relevant infrastructure to mitigate ecological impacts on watercourses. The value of Q347 can be determined from a flow duration curve if a discharge time series of at least ten years is available. However, for smaller catchments such time series are typically unavailable, necessitating the regionalization of Q347 values. In Switzerland, multiple linear regression has been established to estimate the area-specific discharge q347 for ungauged basins. The primary objective of this study was to regionalize Q347 values for small, ungauged catchments (383 in the Canton of Solothurn and 9'034 in the Canton of Zürich) each with an area of less than 100 km². Daily discharge, precipitation, and temperature time series were collected for a 30-year study period from 1990 to 2020 from 56 gauged catchments in Solothurn, and similarly for a ten-year study period from 2013 to 2023 in Zürich, focusing on catchments smaller than 500 km² surrounding the target areas. A total of 30 “static” parameters delineating geometry, topography, geology, land use, and drainage along with nine “climatic” parameters describing temperatures, precipitation distributions, and potential evapotranspiration were defined and computed to characterize both gauged and ungauged catchments. The temporal variability of low flow events was then analysed for observed catchments in the two study areas. Over the past 30 years, the frequency of low flow events below the threshold has systematically increased, while the ten-year Q347 values for these catchments have decreased during the same period. Three multiple linear regression methods were developed and implemented to be coupled with two adjustment techniques supplementing truncated discharge time series. Validation of the proposed models showed reduced errors and increased linear correlations between estimated and observed values compared to standard models. Notably, a spatially more homogeneous yet catchment-specific distribution of estimated values is observable. The proposed models yielded promising results, particularly when time series remain unadjusted, or adjustment is done using the Antecedent Precipitation Index (API) combined with the flow duration curve of a donor basin (Ridolfi et al., 2020). Using recent data for parameter selection and model fitting, especially in the Zürich study area (2013-2022), often resulted in lower Q347 values compared to standard models, reflecting an adaptation to current climatic trends.06 - PräsentationPublikation How popular will ride hailing and ride pooling be with autonomous vehicles?(18.09.2024) van Eggermond, Michael; Erath, Alexander; Tanner, Reto06 - PräsentationPublikation Veloerreichbarkeit Sisslerfeld für verschiedene Nutzendengruppen(Hochschule für Architektur, Bau und Geomatik FHNW, 17.09.2024) Minder, Nils; Erath, Alexander; Mühlich, Nicolas11 - Studentische ArbeitPublikation Bestimmung von Velohauptrouten im Kanton Basel-Stadt(Hochschule für Architektur, Bau und Geomatik FHNW, 21.08.2024) Fiabane, Noè; Erath, AlexanderIm Rahmen des ersten Vertiefungsprojektes im MSE befasst sich diese Arbeit mit der Bestimmung von Velohauptrouten. Durch die Auswertung von Velonetzen im In- und Ausland, das Studium von Fachliteratur und Interviews mit Expertinnen und Experten wurde eine Methodik entwickelt, um Velohauptrouten festzulegen. Diese Methodik wurde am Beispiel vom Kanton Basel-Stadt auf der Ebene des Netzentwurfes angewandt. Anhand des konkreten Beispiels Basel-Stadt zeigte sich, dass die Bestimmung von Velohauptrouten sowohl intuitiv als auch herausfordernd ist. Die Routenführung auf der Ebene der Hauptverbindungen ist in vielen Fällen durch äussere Rahmenbedingungen vorgegeben. Dazu gehören Zwangspunkte wie die Rheinbrücken sowie städtebauliche Hauptachsen. Wo eine solche Führung nicht offensichtlich ist, wurde ein Bewertungsschema entwickelt, das sich auf die Anforderungen des Gesetzes über Velowege und dessen Praxishilfe stützt. Bei unklaren Teilabschnitten einer Route konnte so mittels Varianten unterschiedliche Routenführungen erstellt werden. Anschliessend wurde durch das Bewertungsschema die Bestvariante eruiert und einer Sensitivitätsanalyse unterzogen. Aufgrund der zeitlichen Rahmenbedingungen wurde dies bei vier Abschnitten durchgeführt.11 - Studentische ArbeitPublikation Parkraumkonzept Dreispitz. Analyse Ist-Zustand(Hochschule für Architektur, Bau und Geomatik FHNW, 16.08.2024) Gedik, Kevin; Erath, Alexander; Christoph Merian StiftungDiese Arbeit untersucht die aktuelle Parkplatzsituation auf dem Dreispitzareal in Basel-Stadt, mit dem Fokus auf die Anzahl, Auslastung und Nutzergruppen der vorhandenen Parkplätze. Insgesamt wurden 1’339 aktive Parkplätze erfasst, die sich auf die Allmend, Baurechtsparzellen und das Parkhaus Leimgrube verteilen. Die Analyse zeigt, dass die Parkplatzauslastung insgesamt gering ist, wobei die Spitzenwerte (60 % belegte Parkfelder) um die Mittagszeit erreicht wer-den und die Belegung in der Nacht deutlich abnimmt. Die Arbeit zeigt anhand einer Fallstudie im Bereich der Stuttgartstrasse mögliche Verbesserun-gen bezüglich des Angebotskonzepts auf. Hier könnte durch Mehrfachnutzung die Anzahl der benötigten Parkplätze reduziert und die Flächen für nachhaltige Nutzungen, wie Grünflächen, freigegeben werden. Zudem wird die Anzahl bestehender Parkfelder mit den gemäss unterschiedlichen Reglementen für das Dreispitzareal berechneten maximal möglichen Anzahl Parkfelder verglichen. Dabei wird festgestellt, dass die gemäss der kantonalen Parkraumverordnung für Bauzone 7 errechnete Maximalzahl deutlich geringer liegt als die heute tatsächlich vorhandene Anzahl an Parkfeldern. Eine Umstellung auf Zone 6 würde eine der auf dem Areal tatsächlichen Nutzungen besser Rechnung tragen, auch wenn die damit berechnete Maximalzahl den tatsächlichen Bedarf überschätzt. Es wird empfohlen, zukünftig eine bedarfsorientierte Planung durchzuführen und zusätzlich das Verkehrsaufkommen mit einem Fahrtenmodell zu steuern, um die Parkraumplanung besser an die tatsächlichen Bedürfnisse anzupassen.11 - Studentische ArbeitPublikation Introducing the pedestrian accessibility tool. Walkability analysis for a geographic information system(SAGE, 2017) Erath, Alexander; van Eggermond, Michael; Ordóñez, Sergio A.; Axhausen, Kay W.The indexes for walkability proposed so far refer generally to the closest amenities and public transport stops and the existing network structure. The weights of the attributes do not reflect the independently measured preferences of the users and residents. Design attributes such as the location and type of crossings and walkway design features are usually surveyed in walkability audits. However, such attributes are usually not considered when pedestrian walksheds or other accessibility-based walkability indexes are calculated. Nevertheless, these design attributes are very relevant for actual planning decisions. The proposed walkability index can be behaviorally calibrated, has been implemented as a geographic information system tool, and is published as open source software. The pedestrian accessibility tool allows the evaluation of existing and future urban plans with regards to walkability. The tool calculates Hansen-based accessibility indicators with the use of a customizable specification of the generalized walking costs, and it incorporates user-defined weights of destination attractiveness. The basic user workflow of the tool is summarized. Three case studies show real-world applications of the tool to support the planning of pedestrian infrastructure in an urban context. With indications of potential areas of improvement that have been reported by pilot users working in an urban planning department, hints are also given for future research.01A - Beitrag in wissenschaftlicher ZeitschriftPublikation Where to park your car at home?(18.07.2024) Erath, Alexander; van Eggermond, Michael; Tanner, RetoHow distric parking garages can complement existing parking options in dense urban neighborhoods06 - PräsentationPublikation Virtual reality and choice modelling. Existing applications and future research directions(Edward Elgar Publishing, 2024) van Eggermond, Michael; Mavros, Panos; Erath, Alexander; Hess, Stephane; Daly, AndrewResearch eliciting individuals’ preferences, including stated preference (SP) research, have long utilised imagery as stimuli to visualise either attributes or situations deemed too complex to be expressed verbally. The advent of Virtual Reality (VR) offers choice modelers with exciting new opportunities. This chapter outlines key concepts underlying VR and summarises previous research combining VR and choice modeling. It provides a framework of different dimensions that should be considered when developing VR experiments, including technological aspects (display technology and movement) and other aspects, such as survey duration, motion sickness and the representation of time. The chapter concludes with several ways to further combine choice modeling and VR.04A - Beitrag Sammelband