Joerg Schweizer

Joerg Schweizer
University of Bologna | UNIBO · Department of Civil, Chemical, Environmental and Materials Engineering DICAM

PhD

About

43
Publications
10,907
Reads
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333
Citations
Citations since 2017
21 Research Items
298 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Introduction
Joerg Schweizer received a PhD at the EPFL, Switzerland, in 1999. Since 2003 he is researcher at the Civil Engineering department, University of Bologna, where his research focus is on Personal Rapid Transit (PRT), microsimulations of multi-modal networks with activity based demand, as well as the analysis of cycling infrastructure. He is teaching courses in Sustainable Transportation Engineering and microsimulations. He is in the executive board of the Advanced Transit Association (ATRA) .
Additional affiliations
April 2003 - present
University of Bologna
Position
  • Senior Researcher

Publications

Publications (43)
Article
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Article
Full-text available
This article is concerned with the performance evaluation of connected, autonomous vehicles (CAVs) in a realistic large-scale microsimulation scenario. In particular the question is: how much could a high diffusion of CAVs possibly change (1)~the average travel speeds (2)~the trip times of all traffic participants, including pedestrians, and (3)~th...
Article
This paper analyzes the relation between Shannon’s information entropy and trips made by cyclists in an urban context. Such entropy indicator depends on people distribution across a territory in a specific time. Its evaluation and temporal evolution have multiple applications in transport planning, from the specification of demand distribution mode...
Article
Full-text available
This paper seeks to predict the average waiting time, defined as the time spent moving at 1 ms−1 or less, of urban bicyclists during rush hours while performing different maneuvers at intersections. Individual predictive models are built for the three cyclist typologies previously identified on a large database of GPS traces recorded in the city of...
Article
Full-text available
This article presents an analysis of the supply and demand of a FFBSS recently implemented in the city of Bologna, Italy. The main aspects treated in this paper are: analysis of bike availability; temporal analysis of FFBSS demand; calibration and validation of a novel model that predicts the number of daily trips per available bike. This model is...
Article
Full-text available
Speed and travel time of cyclists play important roles in the cyclist’s route choice and therefore there is a growing need on estimating the dynamic attributes of cyclists. Being able to quantify bicycle speeds on various facilities can help provide suitable accessibility measures based on estimates of travel time by bicycle and to calibrate and va...
Article
Waiting time plays an important role in the cyclists’ route choice, most likely because cyclists, after a stop, need to pedal harder to regain their previous speed. Literature review highlights that cyclists generally overestimate waiting time approximately three to five times higher than their actual waiting time. The aim of this paper is to quant...
Conference Paper
The recent evolution of free-floating bike-sharing system (FFBSS) is a result of the ever growing need to introduce sustainable urban mobility solutions. However, the factors that influence the supply and demand of such systems are not yet widely studied in literature. The paper aims at expanding the knowledge framework of the FFBSSs, by thoroughly...
Article
Full-text available
A large-scale agent-based microsimulation scenario including the transport modes car, bus, bicycle, scooter, and pedestrian, is built and validated for the city of Bologna (Italy) during the morning peak hour. Large-scale microsimulations enable the evaluation of city-wide effects of novel and complex transport technologies and services, such as in...
Article
Full-text available
The objective of this work is the calibration of a generalised cost function for the bicycle network links to be used in conjunction with assignment methods for uncongested networks, as cyclists are generally much less delayed by traffic congestions with respect to auto‐traffic. The calibration's goal is to find a coefficient vector for a linear li...
Article
This paper tackles the problem of characterizing cyclist typologies using a data set of GPS traces. The data is crowdsourced and consists of 29,431 traces recorded in the city of Bologna, Italy, during the rush hours from 7 am to 10 am on weekdays and during the months of April through September in 2017. The different criteria used to group the het...
Article
Full-text available
The main goal of this paper is to describe temporal analysis methods of cyclists’ GPS traces and apply them to a dataset recorded in the city of Bologna, Italy. The dataset consists of approximately 27,000 GPS bike traces registered in May 2016. The novelty of the developed method consists in a particular pre-processing step to reconstruction of th...
Article
Full-text available
Introduction—culture is an interpretation code of societies, which may explain common preferences in a place. Prediction of alternative transport systems, which could be adopted in a city at peace can help urban transport planners and policy makers adjust urban environments in a more sustainable manner. This paper attempts to investigate the role o...
Article
Full-text available
Introduction: As the global warming threat has become more concrete in recent years, there is a need to update transport energy consumptions of cities and to understand how they relate to population density and transport infrastructure. Transportation is one of the major sources of global warming and this update is an important warning for urban pl...
Article
Full-text available
This research describes numerical methods to analyze the absolute transport demand of cyclists and to quantify the road network weaknesses of a city with the aim to identify infrastructure improvements in favor of cyclists. The methods are based on a combination of bicycle counts and map-matched GPS traces. The methods are demonstrated with data fr...
Preprint
Full-text available
This research describes numerical methods to analyze the absolute transport demand of cyclists and then to quantify the road network weaknesses of a city with the aim to identify infrastructure improvements in favor of cyclists. The methods are based on a combination of bicycle counts and map-matched GPS traces and are demonstrated with the city of...
Article
Full-text available
Abstract Introduction The accurate analysis and comparison of transport indicators from a large variety of urban areas can help to evaluate the performance of different adopted transport policies. This paper attempts to determine important transport and socio-economic indicators from 151 urban areas and 51 countries, based on comparable, directly o...
Conference Paper
Full-text available
The microsimulation of larger cities would be of a considerable gain for urban planning. However, compared with traditional traffic flow assignment models, transport networks suitable for microsimulations require a large amount of data (connectivity, properties, road/rail signaling, etc.). One persistent problem with microsimulation models has been...
Conference Paper
Full-text available
This article explains a travel demand generator developed within the SUMOPy framework which aims at providing person-based plans for the SUMO micro-simulator. The plan generation has four principal steps: 1.) a population needs to be generated, with specific attributes for each person; 2.) activities and their associated locations need to be identi...
Article
GPS traces from cyclists are used to retrieve their path by matching the traces to a detailed, attribute-rich urban road network. The main objective of this research is to explore the influence of road network characteristics on the cyclist’s path choice behaviour. The dataset used in this study consists of approximately 27,500 GPS traces, which cy...
Article
Full-text available
The research presented in the paper moves from the results of a feasibility study recently carried out for the development of an offshore wind farm off the cost of Rimini, in the Northern Adriatic Sea. The work, based on in-situ measurements of the environmental conditions, assessed the suitability of the considered area for the development of a re...
Article
A novel map-matching algorithm is proposed, implemented and applied to global positioning system (GPS) traces which have been recorded by cyclists in Bologna, a medium-sized city in the North of Italy. The algorithm has been developed to match geo-referenced traces to a sequence of edges of a given road network model. Map-matching for bike trips is...
Conference Paper
This paper provides a novel assignment method and a solution algorithm that allows to determine the optimum vehicle flows in a fully automated vehicle network. This assignment method incorporates the following specific features: (1) optimal redistribution of occupied and unoccupied vehicles; (2) inter-vehicle spacing is adapted to meet the minimum...
Article
Full-text available
This present work evaluates the performance of extreme bike scenarios for partners-cities of the Central Europe project “BICY”. With extreme bike scenarios we mean that a city has implemented the best possible conditions for cycling. Our analyses confirm that approximately half of all urban trips are less than five km and could be done by bike. Som...
Conference Paper
Contrary to the widespread assumption that car use is inflexible, we find that a vast majority of the population are in fact ready to change to public transport (PT), if its service characteristics feature an easily accessible, clean, frequent transport without transfers and with seated comfort - characteristics that have proven impossible to satis...
Conference Paper
Full-text available
SUMOPy is intended to (1) expand the user-base of SUMO - Simulation of Urban MObility: by providing a user-friendly, yet flexible simulation suite for SUMO, including a GUI and scripting; (2) enhance the demand modeling capacity, in particular by providing an activity-based demand modeling and making more extensive use of the attributes provided by...
Article
This article describes a static assignment method for a class of emerging public transport systems called personal rapid transit (PRT). PRT is a fully automated public transportation system where small-size vehicles run on exclusive guideways. Because of its automated, on-demand service, PRT must be able to automatically reroute empty vehicles afte...
Article
Full-text available
We propose a low-cost uniform analysis framework allowing comparison of the strengths and weaknesses of the bicycling experience within and between cities. A primary component is an expedient, one-page mobility survey from which mode share is calculated. The bicycle mode share of many cities remains unknown, creating a serious barrier for both scie...
Conference Paper
Full-text available
Public policy objectives frequently aim to increase the use of alternative transport and reduce the use of private automobiles. Utilising a low-cost analysis framework that allows comparison of transport behaviour and preferences, applied to ten Central European cities, perspective is gained into the trade-offs between modes. Competition between cy...
Conference Paper
Full-text available
Personal Rapid Transit (PRT) is becoming recognised as a high quality public transport mode. However, there is little literature available for designers and planners of PRT systems, particularly on the capacity and size characteristics of stations. This article will summarize and compare estimations of capacity for serial-type and "sawtooth"-type P...
Article
Full-text available
There is an increasing awareness of Personal Rapid Transit (PRT) and its high service-quality, but one of the first issues being raised concerns PRT's capacity. Furthermore, during the PRT network design phase it is of paramount importance to know the capacity limits even before running extensive microsimulations. However, the PRT capacity analysis...
Conference Paper
Full-text available
We address the problem of orienting the edges of an undirected graph so as to minimize the sum of the distances between a given set of origin-destination pairs in the resulting directed graph. The problem originates from the design of Personal Rapid Transit (PRT) networks. We consider an Integer Linear Programming (ILP) formulation with variables a...
Conference Paper
Full-text available
The active development of Automated Guided Vehicle Systems (AGVSs) has started during the 70th. These systems, often called Personal Rapid Transit (PRT), are fully automated and move 3-6 passengers in electric vehicles on small-size guide-ways with just 1 square meter intersection. The network can operate 24h a day with a small workforce and offers...
Conference Paper
A simple lateral control scheme for automated vehicles is proposed which keeps the vehicle spacing close to its safety limits. The controller-feedback contains a non-linear function which imposes safety and comfort criteria. A time-varying control-gain is derived using a combination of linearization and pole placement methods. Simulations indicate...
Article
Full-text available
this document are intellectual property of its author(s), Jorg Schweizer. Any reproduction,as a whole or in parts, is permitted as long as this copyright notice remains intact and unchanged on eachcopy. Any commercialization using these ideas may be allowed only in agreement with the author(s).
Article
Full-text available
Personal Rapid Transit (PRT) is a novel form of fully automated rail- based public transportation which will become commercially available in the near future. With PRT up to 6 persons or light freight travel in small, individually controlled and electrically driven vehicles on a network of narrow guideways. The vehicles are available on demand and...

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