This dissertation comprises multiple studies surrounding demand estimation, feasibility and capacity analysis, and environmental impact of the Urban Air Mobility (UAM) or Advanced Air Mobility (AAM). UAM is a concept aerial transportation mode designed for intracity transport of passengers and cargo utilizing autonomous (or piloted) electric vehicles capable of Vertical Take-Off and Landing (VTOL) from dense and congested areas. While the industry is preparing to introduce this revolutionary mode in urban areas, realizing the scope and understanding the factors affecting the attractiveness of this mode is essential. The success of UAM depends on its operational efficiency and the relative utility it offers to current travelers. The studies presented in this dissertation primarily focus on analyzing urban travelers' current behavior using revealed preference data and estimating the potential UAM demand for different trip purposes in multiple U.S. urban areas. Chapter II presents a methodology to estimate commuter demand for UAM operations in the Northern California region. A mode-choice model is calibrated from the commuter mode-choice behavior observed in the survey data. An integrated demand estimation framework is developed utilizing the calibrated mode-choice model to estimate UAM demand and place vertiports. The feasibility of commuter UAM operations in Northern California is further analyzed through a series of sensitivity analyses. This study was published in Transportation Research Part A: Policy and Practice journal. In an effort to analyze the feasibility of UAM operations in different use cases, demand estimation frameworks are developed to estimate UAM demand in the airport access trips segment. Chapter III and Chapter IV focus on developing the UAM Concept of Operations (ConOps) and demand estimation methodology for airport access trips to Dallas-Fort Worth International Airport (DFW)/Dallas Love Field Airport (DAL) and Los Angeles International Airport (LAX), respectively. Both studies utilize the latest available originating passenger survey data to understand arriving passengers' mode-choice behavior at the airport. Mode-choice conditional logit models are calibrated from the survey data, further used to estimate UAM demand. The former study is published in the AIAA Aviation 2021 Conference proceeding, and the latter is published in ICNS 2021 Conference proceedings. UAM vertiport capacity may be a barrier to the scalability of UAM operations. A heavy concentration of UAM demand is observed in specific areas such as Central Business Districts (CBD) during the spatial analysis of estimated UAM demand. However, vertiport size could be limited due to land availability and high infrastructure costs in CBDs. Therefore, operational efficiency is critical for capturing maximum UAM demand with limited vertiport size. The study included in Chapter V focuses on analyzing factors impacting vertiport capacity. A discrete-event simulation model is developed to simulate a full day of commuter operations at the San Francisco Financial District's busiest vertiport. Besides calculating the capacity of different fundamental vertiport designs, sensitivity analyses are carried to understand the impact of several assumptions such as service time at landing pads, service time at parking stall, charging rate, etc. The study explores the importance of pre-positioning UAM vehicles during the time of imbalance between arrival and departure requests. This study is published in ICNS 2021 Conference proceedings. Community annoyance from aviation noise has often been a reason for limiting commercial operations at several major airports globally. Busy airports are located in urban areas with high population densities where noise levels in nearby communities could govern capacity constraints. Commercial aviation noise is only a concern during landing and take-offs. Hence, the impact is limited to communities close to the airport. However, UAM vehicles would be operated at much lower altitudes and have more frequent taking-off and landing operations. Since the UAM operations would mostly be over dense urban spaces, the noise potential is significantly high. Chapter VI includes a study on preliminary estimation of noise levels from commuter UAM operations in Northern California and the Dallas-Fort Worth region. This study is published in the AIAA Aviation 2021 Conference proceedings. The final chapter in this dissertation explores the impact of airspace restrictions on UAM demand potential in New York City. Integration of UAM operations in the current National Airspace System (NAS) has been recognized as critical in developing the UAM ecosystem. Several pieces of urban airspace are currently controlled by Air Traffic Control (ATC), where commercial operation density is high. Even though the initial operations are expected to be controlled by the current ATC, the extent to which UAM operations would be allowed in the controlled spaces is still unclear. As the UAM system matures and the ecosystem evolves, integrating UAM traffic with other airspace management might relax certain airspace restrictions. Relaxation of airspace restrictions could increase the attractiveness of UAM due to a decrease in travel time/cost and relatively more optimal placement of vertiports. Quantifying the impact of different levels of airspace restrictions requires an integrated framework that can capture utility changes for UAM under different operational ConOps. This analysis uses a calibrated mode-choice model, restriction-sensitive vertiport placement methodology, and demand estimation process. This study has been submitted for ICNS 2022 Conference. / Doctor of Philosophy / Urban Air Mobility (UAM) or Advanced Air Mobility (AAM) are concept transportation modes currently in development. It proposes transporting passengers and cargo in urban areas using all-electric Vertical Take-Off and Landing (eVTOL) vehicles. UAM is a multi-modal concept involving low-altitude aerial transport. The high capital costs involved in developing vehicles and infrastructure suggests the need for meticulous planning and strong strategy development in the rolling out of UAM. Moreover, urban travelers are relatively more sensitive to travel time savings and travel time reliability; therefore, the efficiency of UAM is critical for its success. This dissertation comprises multiple studies surrounding demand estimation, feasibility and capacity analysis, and the environmental impact of UAM. To estimate the potential for UAM, we need first to understand the mode-choice making behavior of urban travelers and then estimate the relative utility UAM could possibly offer. The studies presented in this dissertation primarily focus on analyzing urban travelers' current behavior and estimating the potential UAM demand for different trip purposes in multiple U.S. urban areas. The system planners would need to know the individual or combined effect of various parameters in the system, such as cost of UAM, network size of UAM, etc., on UAM potential. Therefore, sensitivity analyses with respect to UAM demand are performed against various framework parameters. Capacity constraints are not initially considered for potential demand estimation. However, like any other transportation mode, UAM could suffer from capacity issues that can cause operational delays. A simulation study is dedicated to model UAM operations at a vertiport and estimating factors affecting vertiport capacity. After observing the demand potential for certain optimistic scenarios, we realized the possibility of a large number of low-flying vehicles, which could cause annoyance and environmental impacts. Therefore, the following study focuses on developing a noise estimation framework from a full-day of UAM operations and estimating a highly annoyed population in the Bay Area and Dallas-Fort Worth Region. In our studies, modeling restricted airspaces (due to commercial operations at large airports) was always a critical part of the analysis. The urban airspaces are already quite congested in some urban areas, and we assumed that UAM would not operate in the restricted airspaces. The last study in this dissertation focuses on quantifying the impact of different levels of airspace restrictions on UAM demand potential in New York. It would help system planners gauge the level of integration required between the UAM and National Airspace System (NAS).

This dissertation addresses the validation of the hypothesis there is a general sense that violence and security perception influence the use of sustainable travel modes. The research characterizes the issue of security perception among University of São Paulo (Brazil) users and identifies the way the sense of security and violence occurrences are related to the travel mode choice. An online survey on security perception and the way its participants access the campus was conducted. The target relationships were explored by Decision Tree (DT) algorithms. An initial exploratory analysis revealed occurrences of violence and reports of insecurity perception were strongly correlated on streets around the campus. The time analysis of violence distribution presented the incidents concentrated at night and during the week. The study also showed that security perception variation according to gender and travel mode choice is less sensitive to security perception than to the occurrence of violence, or type of affiliation to the university. Finally, DT algorithms explored the relation of spatially treated variables (i.e. route length to the university, density of violence occurrences and insecurity reports on the route) to mode choice. The results also showed that distance to the campus was relevant to the mode choice only in routes not strongly considered unsafe. In routes of higher insecurity perception, the share of nonmotorized modes was more expressive and the largest participation of sustainable modes was on routes with high incidence of violence. Since it is counterintuitive to assume numerous walking trips are a consequence of violence, the opposite was considered as a possible explanation to those results. The present study reinforces the need for increased surveillance in regions with high participation of non-motorized modes, for preventing users from shifting to motorized modes. / Esta dissertação busca comprovar a hipótese de que a violência e a percepção de segurança influenciam o uso de modos de transporte sustentáveis. A pesquisa caracteriza a questão da percepção de segurança entre os usuários da Universidade de São Paulo (Brasil), em São Carlos, e identifica como o sentimento de segurança pessoal e a violência estão relacionados com a escolha do modo de viagem. Foi realizada uma pesquisa on-line sobre a percepção de segurança dos usuários da universidade e a forma como eles acessam o campus. As interações foram exploradas por algoritmos de Árvore de Decisão (AD). Uma análise exploratória inicial mostrou que ocorrências de violência e relatos de insegurança estavam fortemente correlacionados nos trechos de via ao redor do campus. A análise temporal da distribuição da violência apresentou os incidentes concentrados à noite e durante os dias de semana. Além disso, a pesquisa mostrou que a percepção de segurança variou de acordo com o gênero e a escolha modal é menos sensível à percepção de segurança do que a ocorrência de violência, ou vinculação com a universidade. Por fim, os algoritmos de AD foram executados para explorar a relação das variáveis tratadas espacialmente (ou seja, o comprimento da rota até o campus, além da densidade de ocorrências e relatos de insegurança na rota) com a escolha modal. O último resultado obtido na análise foi que a distância até a universidade era relevante para a escolha modal apenas em rotas onde não há numerosos relatos de insegurança. A participação dos modos não motorizados foi mais expressiva nas rotas com maior percepção de insegurança, e em rotas com alta incidência de violência. Como não é razoável supor que mais viagens a pé são uma consequência dos roubos e sim o oposto, o estudo reforça a importância de aumentar a segurança nas regiões de alta incidência de viagens não motorizadas, de forma a não incentivar a migração destes usuários para modos motorizados.

Informações desagregadas de demanda por transportes são recursos essenciais ao correto planejamento urbano, especialmente no que se refere ao transporte público. Contudo, o acesso a estes dados é limitado, devido ao alto custo para coleta de pesquisas domiciliares e à confidencialidade de informações individuais. A presente tese de doutorado aborda esta problemática ao propor dois métodos heurísticos de desagregação de dados, através de simulação geoestatística. Propõe-se empregar, como um input aos procedimentos, informações com alta disponibilidade, como, por exemplo, os microdados, coletados pelo censo demográfico. A diferença principal entre os métodos é que o primeiro não necessita de valores de dados provenientes de Pesquisa Origem/Destino do município de São Paulo, área de estudo deste trabalho. Ambas as abordagens, que podem ser aplicadas a outros diferentes estudos de caso, compreendem um procedimento alternativo para deconvolução de semivariogramas, Simulação Sequencial Gaussiana e validação, considerando malhas regulares de diferentes suportes. Os mapas e métricas estatísticas gerados comprovam que é possível desagregar dados, associados a Áreas de Ponderação de Setores Censitários (Método Proposto 1 – MP1) e a Zonas de Tráfego (Método Proposto 2 – MP2), através dos procedimentos aplicados. Além disso, este trabalho apresenta contribuições metodológicas ao viabilizar: a geração de diversos cenários que reproduzam o comportamento espacial da variável; e o estudo da incerteza associada às simulações. / Disaggregated data for travel demand are essential resources towards good urban planning, especially with regard to public transportation. However, the access to such data is limited due to high costs of collecting household data and due to individual information confidentiality. The present PhD dissertation addresses this issue by introducing two heuristic methods to disaggregate data using geostatistical simulation. It is proposed to employ, as input to the procedures, information with high availability, such as census microdata. The main difference between both methods rely on the fact that the first does not require data values of any Origin/Destination Survey of the São Paulo city, study area of this research. Both approaches, which can be applied to other different study cases, comprise an alternative procedure for semivariogram deconvolution, Sequential Gaussian Simulation and validation, using regular grids of various spatial scales. The resulting maps and statistical metrics corroborate that is possible to disaggregate data associated with a set of Census Tracts (Proposed Method 1 – MP1) and Traffic Analysis Zones (Proposed Method 2 – MP2). Besides, this dissertation presents relevant contributions as it enables: creating different scenarios to reproduce the spatial behavior of the study variable; and assessing the associated uncertainty.

Increasing cycling as a means of personal travel couldgenerate environmental benefits if associated with acorresponding decrease in car-based transport. In seeking topromote cycling in wintertime, it is desirable to understandhow important the road surface condition is compared to otherfactors in people's decision to cycle or not. In this thesis,the possibility of increasing the number of cyclists byimproving the winter maintenance servicelevel on cycleways isexamined. The attitudes towards cycling during winter ingeneral, and in relation to winter maintenance of cycleways inparticular, is studied through questionnaire surveys. Bicyclemeasurements are related to weather data from Road WeatherInformation System, in order to know the influence on cycleflow during winter from different weather factors. Fieldstudies are performed testing unconventional winter maintenancemethods, in order to see if a higher service level could beachieved on cycleways and if that would lead to an increase inwinter cycling frequency. The field studies are evaluatedthrough road condition observations, measurements of friction,bicycle counts, a questionnaire survey and interviews. A visualmethod to assess winter road conditions on cycleways isdeveloped, in order to compare the service levels achievedusing different winter maintenance methods. There is a clear difference in mode choice between seasons.With improved winter maintenance service level it could bepossible to increase the number of bicycle trips to work duringwinter with, at the most, 18 %, and decrease the number of cartrips with 6 %. However, it could not be concluded with bicyclemeasurements, that an enhanced service level in fact, generateda higher winter cycling frequency. To increase cycling during winter, snow clearance is themost important maintenance measure. Skid control is not assignificant for the choice of mode but is important to attendto for safety reasons. Winter road condition propertiesimportant both with regard to safety and accessibility ofcyclists, are icy tracks formed when wet snow freezes, snowdepths greater than about 3 cm of loose snow or slush,unevenness in a snow covered surface, loose grit on a baresurface. Weather factors with negative influence on winter cyclingfrequency, are temperatures below +5 ° C,precipitationand strong winds. Only the occurrence of precipitation, not theamount of rain or snow, is significant for the cycle flow. Lowtemperatures are more important in reducing the cycle flow thanprecipitation. Temperatures around 0 ° C seem to be extracritical for cyclists, probably due to the larger influence ofprecipitation and slippery road conditions at thesetemperatures. An unconventional method using a power broom for snowclearance and brine or pre-wetted salt for de-icing, provides ahigher service level than winter maintenance methodstraditionally used, but it is about 2 to 3 times moreexpensive. The method has great potential in regions, such assouthern Sweden, with low snow accumulations but with major iceformation problems. To assess the maintenance service level,the visual assessment method developed and tested in thisproject is adequate for the purpose, however, furtherimprovements are desirable. As a complement to the visualassessment, a Portable Friction Tester can be used to measurethe surface friction on cycleways during wintertime. Keywords:Cycleways, winter maintenance, maintenanceservice level, mode choice, winter cycling frequency, wintermaintenance equipment, winter road condition assessment,bicycle measurements, friction measurement.

Bei verkehrspolitischen und infrastrukturellen Massnahmen folgen als wesentliche Nachfrageveränderungen vor allem Routen- und Verkehrsmittelwahleffekte. Mit der Anwendung der sequentiellen Routen- und Verkehrsmittelwahlmodelle, ist bei solchen Massnahmen aus verschiedenen Gründen eine konsistente und gesamthafte Gleichgewichtslösung nicht möglich. Das Ziel dieser Untersuchung war, ein konsistentes und verfeinertes Verfahren zu entwickeln, mit dem die Routen- und Verkehrsmittelwahl simultan bzw. in einem Schritt als eine Entscheidung berechnet werden kann. Neben dem Gleichgewicht bei der Verteilung der Verkehrsnachfrage auf die Alternativen, war die konsistente Schätzung der Modellparameter für die Bewertung von Einflussfaktoren bei den Entscheidungen hier eine weitere wichtige Anforderung. Das Modell ist in der Lage, ein realitätsentsprechendes Verhalten der Verkehrsteilnehmer, sowohl bei schwach, als auch bei stark belasteten Strassennetzen, zu beschreiben. Die unterschiedliche Wahrnehmung der Reisekosten der Verkehrsteilnehmer und die Netzüberbelastungen werden durch ein stochastisches Nutzergleichgewicht abgebildet. Das entwickelte Verfahren ermöglicht es: - die Nachfrageaufteilung mit einem konsistenten Gleichgewicht zwischen Verkehrsangebot und Verkehrsnachfrage zu berechnen. Dabei wird ein Gleichgewicht nicht nur innerhalb des Strassen- oder Schienennetzes, sondern zwischen allen verfügbaren Alternativen (unabhängig vom Verkehrsmittel) gesucht. - durch die iterative Kalibration der Modellparameter und die Nachfrageaufteilung ein konsistentes Gleichgewicht zwischen den geschätzten Modellparametern für die Nutzenfunktion und der Nachfrageaufteilung auf die vorhandenen Alternativen (Routen) zu berechnen. - mit einem stochastischen Nutzergleichgwicht die unterschiedliche Wahrnehmung der Nutzen bzw. der generalisierten Kosten der Verkehrsteilnehmer bei der Nachfrageaufteilung zu berücksichtigen. - die Auswirkungen von Angebotsveränderungen auf die Verkehrsmittelwahl und Routenwahl durch simultane Modellierung der Entscheidungen konsistent und ohne Rückkoppelungschritte zu berechnen.

<p>Increasing cycling as a means of personal travel couldgenerate environmental benefits if associated with acorresponding decrease in car-based transport. In seeking topromote cycling in wintertime, it is desirable to understandhow important the road surface condition is compared to otherfactors in people's decision to cycle or not. In this thesis,the possibility of increasing the number of cyclists byimproving the winter maintenance servicelevel on cycleways isexamined. The attitudes towards cycling during winter ingeneral, and in relation to winter maintenance of cycleways inparticular, is studied through questionnaire surveys. Bicyclemeasurements are related to weather data from Road WeatherInformation System, in order to know the influence on cycleflow during winter from different weather factors. Fieldstudies are performed testing unconventional winter maintenancemethods, in order to see if a higher service level could beachieved on cycleways and if that would lead to an increase inwinter cycling frequency. The field studies are evaluatedthrough road condition observations, measurements of friction,bicycle counts, a questionnaire survey and interviews. A visualmethod to assess winter road conditions on cycleways isdeveloped, in order to compare the service levels achievedusing different winter maintenance methods.</p><p>There is a clear difference in mode choice between seasons.With improved winter maintenance service level it could bepossible to increase the number of bicycle trips to work duringwinter with, at the most, 18 %, and decrease the number of cartrips with 6 %. However, it could not be concluded with bicyclemeasurements, that an enhanced service level in fact, generateda higher winter cycling frequency.</p><p>To increase cycling during winter, snow clearance is themost important maintenance measure. Skid control is not assignificant for the choice of mode but is important to attendto for safety reasons. Winter road condition propertiesimportant both with regard to safety and accessibility ofcyclists, are icy tracks formed when wet snow freezes, snowdepths greater than about 3 cm of loose snow or slush,unevenness in a snow covered surface, loose grit on a baresurface.</p><p>Weather factors with negative influence on winter cyclingfrequency, are temperatures below +5 ° C,precipitationand strong winds. Only the occurrence of precipitation, not theamount of rain or snow, is significant for the cycle flow. Lowtemperatures are more important in reducing the cycle flow thanprecipitation. Temperatures around 0 ° C seem to be extracritical for cyclists, probably due to the larger influence ofprecipitation and slippery road conditions at thesetemperatures.</p><p>An unconventional method using a power broom for snowclearance and brine or pre-wetted salt for de-icing, provides ahigher service level than winter maintenance methodstraditionally used, but it is about 2 to 3 times moreexpensive. The method has great potential in regions, such assouthern Sweden, with low snow accumulations but with major iceformation problems. To assess the maintenance service level,the visual assessment method developed and tested in thisproject is adequate for the purpose, however, furtherimprovements are desirable. As a complement to the visualassessment, a Portable Friction Tester can be used to measurethe surface friction on cycleways during wintertime.</p><p><b>Keywords:</b>Cycleways, winter maintenance, maintenanceservice level, mode choice, winter cycling frequency, wintermaintenance equipment, winter road condition assessment,bicycle measurements, friction measurement.</p>

The transport sector is an extensive contributor to the total CO2 emissions, and private transports hold a vast share. This has implications on environmental and human health, which eventually have economic consequences for society. Equal access to opportunities is essential in a sustainable society and public transport is a crucial element. Apart from public transport, physical active transport modes are key components in a sustainable transport system. The aim of this thesis was through an intersectional perspective to gain deeper understanding about travel mode choices and to identify barriers to use of public transport. This thesis comprises an extensive literature review of 62 articles, reviews and publications on travel behavior and travel mode choice undertaken in different parts of Sweden, Germany, UK, Portugal and the USA. A limited case study shares through nine qualitative interviews the travel experiences of four men and five women in different ages in Nåntuna/Vilan and Sävja in Uppsala, Sweden. The influencing factors were categorized and later intersectionally analyzed with the respect to gender, age and socioeconomic class. The analysis revealed that travel mode choices are complex and can be made for various reasons. Access to a car, habits, travel pattern and time indicated to be the most influencing factors. Economic resources seemed to influence the availability of transport mode, and indications could be seen that economic resources might impair gender differences. Looking at preferences and actual mode choice, the study sample illustrates that men, older, and richer, are having more opportunities to take their preferable mode choice. Planning factors appeared to both promote and constrain the use of public transport. Public transport seemed to have hard to meet everyone’s need, and indicated to have low competitiveness to the car. It is suggested that future research focuses on how to meet more people’s need in order to increase the use of public transport by its own attractiveness. Further research is also suggested about the health perspective of physical active modes and public transport. The study revealed difficulties in studying experiences outside the white, majority Swedish norm. More time would have been needed to include ethnicity, as it is an important aspect and should be included in future research. / Transportsektorn bidrar till en omfattande del av det totala koldioxidutsläppet, och privata transporter utgör en ansenlig del av detta. De miljö- och hälsomässiga negativa effekterna är betydande, vilket följaktligen kommer att få sociala och ekonomiska konsekvenser. Det övergripande politiska målet är att öka användandet av hållbara transportmedel, så som fysiskt aktiva färdmedel och kollektivtrafik. Lika möjligheter att nå arbeten och service är en förutsättning för ett hållbart samhälle, och kollektivtrafiken är en viktig nyckel till detta. Förutom kollektivtrafiken är också fysiskt aktiva färdmedel, så som cykling och gång, en nyckelfaktor i ett hållbart transportsystem. Syfte: Syftet med den här masteruppsatsen är att få djupare kunskap om de faktorer som påverkar resebeteende och färdmedelsval, samt att identifiera barriärer för kollektivt resande. Uppsatsen har ett intersektionellt perspektiv och undersöker hur maktfaktorer som kön, ålder och socioekonomisk klass påverkar valet av färdmedel. Metod: En omfattande litteraturstudie om resvanor och resebeteende i Sverige, Tyskland, Storbritannien, Portugal och USA föregick en fallstudie. Med fokus på de två områdena Nåntuna/Vilan och Sävja, i Uppsala, Sverige, genomfördes en mindre fallstudie. Nio kvalitativa intervjuer belyser fyra män och fem kvinnors erfarenheter från sina dagliga färdmedelsval. Resultat: Av dessa framgår att färdmedelsval är komplexa; de kan göras av olika anledningar, samt olika anledningar kan leda till samma val. En mängd olika faktorer indikerade på att påverka valet av färdmedel, bland annat tillgången till bil, vanor, attityder, resmönster och restiden. Dessutom indikerar resultat att maktfaktorer som kön, ålder och socioekonomisk klass formar möjligheterna till att välja färdmedel. Indikationer tyder på att ekonomiska resurser styr tillgången på färdmedelsval samt kan minska könsskillnader. Det emellertid ringa urvalet exemplifierar att män, äldre och rikare har större möjligheter att välja sitt önskvärda färdmedelsval. Respondenternas erfarenheter visar att planeringsfaktorer kan både främja och försvåra användandet av kollektivtrafiken. Kollektivtrafiken verkade ha svårt att möta människors olika behov och därmed vara konkurrenskraftig i förhållande till bilen. Mer forskning om detta är nödvändig för att öka och behålla resenärer utifrån kollektivtrafikens egen attraktionskraft. Vidare så föreslås ytterligare studier om länken mellan hälsa, fysiskt aktiva färdmedelsval och kollektivtrafikanvändande. Studien innefattar inte erfarenheter från personer med annan bakgrund än vit, majoritetssvensk eftersom det hade krävt mer tid än vad denna studie medgav. Det är dock ett viktigt perspektiv för framtida forskning.

Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2016-09-02T13:18:26Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) vs. definitiva_Dissertação_Mayara Moraes Monteiro.pdf: 4228121 bytes, checksum: 54dc912414b3c77351997697e1806b2d (MD5) / Made available in DSpace on 2016-09-02T13:18:26Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) vs. definitiva_Dissertação_Mayara Moraes Monteiro.pdf: 4228121 bytes, checksum: 54dc912414b3c77351997697e1806b2d (MD5) Previous issue date: 2016-02-29 / CNPq / With the fast improvement of technology, accompanied by changes in the lifestyle and the growth of cities, that made the Public Transport (PT) system more complex, delivery of integrated information on PT systems in an efficient and clear way are of the outmost importance but not always available. This study sought to understand the relation between travel information, PT use intentions and non-habitual travel (at night). The hypothesis is that PT use intentions are related to the perceived usefulness and the ease-of-use of the system, which are related to information quality and real-time information availability. The hypothesized relations are anchored theoretically in the Extended Technology Acceptance Model and validated empirically in two sources of data: (i) Copenhagen (Denmark), characterized by a highly integrated PT system with an advanced web-based information system; (ii) Recife and Natal (Brazil), characterized by a lower perceived Level Of Service (LOS) and non-integrated information sources. The data was collected through a tailor-made survey answered for 1,123 university students in Denmark and Brazil. Structural equation models were employed for explaining the use of PT as a function of the observed respondent characteristics and the latent constructs. The results show: (i) information quality is essential for explaining PT use; (ii) perceived information quality is directly and positively related to perceived LOS, convenience and familiarity with the PT system; (iii) the use of real-time information is positively related to information quality and familiarity, while it is negatively associated with perceived PT security; (iv) PT use at night is positively related to habitual PT use and information search / Com a rápida melhoria da tecnologia, acompanhada por mudanças no estilo de vida, e o crescimento das cidades, que tornou o transporte público (TP) muito mais complexo, entregar informação integrada do sistema de transporte de uma forma eficiente e clara é de extrema importância, mas nem sempre está disponível. Este estudo procurou entender a relação entre informações sobre viagens, intenções de uso de TP e viagens não habituais (à noite). A hipótese é que as intenções de uso de TP estão relacionadas com a percepção sobre a utilidade e a facilidade de uso do sistema, que estão relacionados com a qualidade da informação e a disponibilidade de informação em tempo real. As relações hipotéticas são ancoradas teoricamente na Extensão do Modelo de Aceitação Tecnológica e validado empiricamente através de duas fontes de dados: (i) Copenhague (Dinamarca), caracterizado por um sistema de transporte altamente integrado com um avançado sistema de informação baseado na web; (ii) Recife e Natal (Brasil), caracterizadas por um nível de percepção do nível de serviço como mais baixo e fontes de informação não integradas. Os dados foram recolhidos através de um questionário feito sob medida e respondido por 1.123 estudantes universitários na Dinamarca e no Brasil. Modelos de equações estruturais foram utilizados para explicar a utilização do TP em função das características observadas dos respondentes e os construtos latentes. Os resultados mostram: (i) a qualidade da informação é essencial para explicar o uso do TP; (ii) a percepção da qualidade da informação está direta e positivamente relacionada com a percepção do nível de serviço, conveniência e familiaridade com o sistema de TP; (iii) o uso da informação em tempo real está positivamente relacionado com a qualidade da informação e familiaridade, enquanto está associado negativamente com a percepção de segurança do TP; (iv) utilização do TP à noite está positivamente relacionada com a utilização habitual do TP e a busca de informações

The purpose of this thesis is twofold: Firstly, it explores the reasons parents state for choosing the car to take their children to school; Secondly, it investigates how the characteristics of the journey relate to children’s wellbeing, mood, and cognitive performance. This thesis consists of three papers (Papers I, II, and III). Participating in Paper I were 245 parents of schoolchildren aged between 10 and 15 in Värmland County, Sweden. These parents answered a questionnaire wherein they stated to what degree certain statements correlated with their decision to choose the car. In Paper II, 237 children in grade 4 (aged 10-11), in the City of Staffanstorp, Sweden, recorded all their journeys in a diary over one school week, also reporting on their travel mode, current mood while travelling, activities on arrival, and experiences vis-à-vis those activities. Participating in Paper III was a sample of 345 children aged between 10 and 15 attending five public schools in Värmland County, Sweden. These children rated their current mood, filled out the Satisfaction with Travel Scale (capturing the travel experience), reported details about their journeys, and took a word fluency test. Parents’ wish to accompany their children to school, and the convenience of the car, both impact upon the travel mode decision. In addition, parents also seem to choose the car regardless of the distance between home and school. The findings further reveal that the mood children are in varies with how they travel and where they go, and that there is a difference between boys’ and girls’ experiences. Children who travel by car experience the lowest degree of quality and activation, something which is maintained throughout the school day (especially for girls). Social activities during travel bring a higher degree of quality and excitement, while solitary activities bring more stress. The findings further show that using a smartphone, or doing a combination of activities during the journey, results in better cognitive performance. Thus, it is concluded that the mode choice that parents make for their children correlates with those children’s mood and experience. Specifically, where and how children travel, what they do when they travel, and how long they travel for affect their experiences, mood, and/or cognitive performance. / The aim of this thesis is twofold. Firstly, it explores parents’ stated reasons for choosing the car for their children’s school journeys. Secondly, it investigates the relationship between the characteristics of a journey (i.e. travel mode, travel time, and activities conducted while travelling) and children’s wellbeing (through domain-specific satisfaction), current mood, and cognitive performance. The overall findings show that parents value the car both for its convenience and for the possibility of accompanying their children. Parents also use the car regardless of the distance between home and school. Travel affects children in various ways; for instance, doing certain activities while traveling can help boost cognitive performance and make children feel happy and excited. Notably, being passive during the journey makes children feel stressed and those who travel to school by car are the most tired during the school day. This implies that parents’ travel mode choice affects children’s wellbeing and cognitive performance. These insights are important when it comes to addressing current challenges relating to children’s day-to-day travel: How they experience their day-to-day travel may contribute toward how children travel in the future. / Den här avhandlingen har två delsyften. Först undersöks vilka skäl föräldrar anger för varför deväljer att skjutsa sina barn till skolan med bil. Ett andra syfte är att undersöka hur detta val påverkarbarns mentala hälsa via självskattad upplevelse av skolresan och hur de känner sig vid ankomst(humör). Ytterligare ett syfte är att undersöka hur upplevelsen av skolresan påverkar hur barnenpresterar när de kommer till skolan. Avhandlingen innehåller tre artiklar. I Artikel I deltog 245föräldrar till barn i årskurs 4, 6 och 8 i värmländska skolor. Föräldrarna angav i vilken utsträckningolika skäl påverkar deras val att skjutsa barnen till skolan med bil. I artikel II deltog 237 barn (varav101 flickor) från årskurs 4 i Staffanstorp, Skåne. Barnen förde resdagbok över alla resor de gjordeunder en vecka. I dagboken beskrev de vart de reste, vilka färdmedel de använt, deras humör underresan (som skattades som ledsen-glad och trött-pigg), vilka aktiviteter de ägnat sig åt vidslutdestinationen samt deras upplevelser av dessa aktiviteter. I Artikel III deltog 345 barn frånårskurs 4, 6 och 8 i Värmland. Istället för resdagbok skattade barnen sitt humör, hur nöjda de varmed resan genom att fylla i Satisfaction with Travel Scale adapted for Children (STS-C), resedetaljersamt gjorde ett ordflödestest direkt vid ankomst i skolan. Resultaten visar bland annat att föräldrars önskan att spendera tid med sina barn och praktiskaaspekter med bil ligger till grund för valet av bil. Huruvida det är ett långt eller kort avstånd tillskolan påverkar inte valet att använda bil. Barns humör varierar beroende på hur de reser(färdmedel) och vart de reser (destination). En skillnad observerades också mellan flickor ochpojkar och mellan olika årskurser där t.ex. fickor påverkades mer negativt av att resa med bil änpojkar. Barn som reser med bil till skolan är minst nöjda (upplevde en lägre grad av kvalitet) ochpå sämre humör (är känslomässigt mindre aktiva) vilket också håller i sig under skoldagen. Att ägnasig åt sociala aktiviteter (konversera med vänner och familj) under resan bidrar till en högre upplevdkvalitet och mer upprymdhet medan barn som ägnat sig åt aktiviteter utan sällskap upplever enhögre grad av stress. Resultaten visar också att barn som använder sin smartphone eller kombinerarolika aktiviteter under resan presterar bättre på kognitivt test.

This diploma thesis is concerned with the issue of sustainable transport. In the theoretical part, the emphasis is placed on setting the concept of sustainable transport into a broader context; it also describes various factors influencing the choice of the means of transport, which is crucial for transport planning. Furthermore, it describes a set of diverse tools used for transport regulation. At the end of the theoretical part, it mentions specific approaches implemented in selected cities all over the world. The practical part is based on a significant personal research, which helps to understand the issues of transport in a selected area of Prague. On the basis of this research, it subsequently suggests possible measures that might lead to a decrease in the intensity of automobile transport in the aforementioned area. Most of those measures can be similarly applied in other city areas as well.