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Integrated Algorithms for Cost-Optimal Public Transport PlanningSchiewe, Alexander 28 February 2019 (has links)
No description available.
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<b>Advancing the quantitative assessment of transportation equity for planning</b>Rajat Verma (19165507) 18 July 2024 (has links)
<p dir="ltr">The passing of the Equity Executive Order by the US government in 2021 and the Equity Action Plan developed by the US Department of Transportation have made addressing equity a priority in transportation planning projects. The Equity Action Plan recognizes socio-economically disadvantaged (SED) and rural communities as overburdened and underserved in transportation services and highlights the need to provide basic equality of opportunities and a fair distribution of burdens in transportation. In response, several transportation planning agencies have proposed their own criteria, methods, metrics, and tools to quantify equity issues and use them in planning. However, transport equity is a multi-faceted phenomenon and its quantification faces challenges due to a lack of standards and a comprehensive assessment framework.</p><p dir="ltr">The first objective of this dissertation is to develop a nuanced understanding in three key aspects of transport equity – (i) accessibility to opportunities, (ii) environmental burden, and (iii) health outcomes – based on the concept of ‘compound disadvantage’. A detailed assessment of prominent accessibility measures reveals a substantial measurement bias in the current measures, which can result in inappropriate conclusions such as an overestimating accessibility to opportunities for SED neighborhoods on average by 16%. Despite this, spatial accessibility is found to be high for compact, urban areas which also tend to have higher concentration of SED communities. However, there are significant modal differences in accessibility that reveal a substantial lack of utilization of infrastructure for alternate modes of travel – public transit, walking, and bicycling.</p><p dir="ltr">Evaluation of inequalities in environmental and health outcomes shows substantial disadvantage faced by SED communities, particularly poor people and people of color. A proposed emission equity index shows that low-income and racial minority neighborhoods of Indiana’s largest cities disproportionately experience vehicular pollution from travelers residing in high-income, White-majority areas passing through their neighborhoods. Similarly, essential workers living in low-income areas are observed to have experienced significantly worse COVID-19 infection rates than in high-income areas in Chicago and New York City, and this effect was mediated by their ‘mobility vulnerability’. Together, these results suggest a strong compounding of disadvantage by the current transportation systems for already disadvantaged communities despite their higher accessibility to opportunities owing to their predominantly urban residences.</p><p dir="ltr">The second objective of this dissertation is to integrate the equity measures in an interactive screening tool for identifying the vulnerable and priority areas for investment. ‘Indiana Equity Atlas’, an equity-screening dashboard tool, is developed to allow transportation planners and analysts to identify priority areas in terms of compound disadvantage of two selected indicators of socio-economic, accessibility, environmental burden, and health disadvantage. With this tool and the associated data and metrics, this work seeks to provide a comprehensive framework for identifying vulnerable regions to formally capture equity issues in transportation and urban planning and analysis.</p>
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Engaging with Gender in Public Transport PlanningEvelyn H. Ybarzabal Unknown Date (has links)
Abstract This thesis investigates the extent to which gender considerations are being incorporated into the planning and policy making of the public transport system in Queensland, Australia. Using public transport in South East Queensland (SEQ) as a case study, this thesis analyses why and how gender issues are still being overlooked and excluded from mainstream planning. It investigates the application of a gender analysis approach in theory and practice and provides recommendations for integrating a gender perspective in the development of public transport policy. The study is beneficial in terms of making contributions to promote better understanding of how feminist theory could enhance the development of public transport policy. Both qualitative and quantitative research methods were employed. Participants were selected from different demographic groups (politicians, bureaucrats, academics, women’s subgroups and individuals from the broader community) using theoretical/purposive sampling methods. The collection and analysis of data were guided by feminist sociological theory as a framework and gender analysis was utilised in reviewing transport research, policies, programs, plans and legislation. The thesis findings showed that there are gender differentiated behaviours between men and women in relation to their transport needs. In particular, the manner in which men and women behave is linked to an array of underlying factors such as gender relations, the social role of women and their personal circumstances, household structure, transport-disadvantage issues, and their broader socio-economic environment. The research noted that gaps exist in the current public transport delivery in SEQ. Three main categories of issues were identified namely key gender issues, gender-obscured issues and gender-neutral issues. The key gender issues included personal safety and security, time-space pressured travel, lack of adequate facilities, driver’s knowledge, skills and attitudes, mobility-constraint issues and features of public transport that have gender impacts. The gender-obscured issues included language difficulty, cost and infrequency of service. The gender-neutral issues included but not limited to public transport design, unequal distribution of transport services and impacts specific to areas outside the TransLink network. The research highlights how the issues interlock with the social, economic, cultural, structural and political factors of the environment in which women and men live. The thesis concludes that there is a lack of effective engagement with women, and that greater attention to gender consideration in developing public transport policies is required. While Queensland State Government has made a commitment to improving public transport provision for women, it appears that such rhetoric has not yet been translated into practice. The research also noted that the practicality and political implications of transport policy seem to obtain a higher priority in decision-making domains than gender considerations. Failure to examine both ends of the gender continuum in service delivery will make more difficult the development of public transport policy as a gender-sensitive social policy. Furthermore, public transport policy making should not be undertaken in isolation from other planning activities. Other considerations outside the traditional planning approach have to be examined, so planners will have a greater appreciation of, not only the needs of the conventional public transport users, but also of those not belonging to this category including different subgroups of women. Policy planning often overlooks the construction of women as an homogenous category, without considering that they are a heterogeneous group with tremendous differences in age, ethnicity, religion and class, thus requiring different considerations for policy intervention. Policy planning has been constructed as an exercise with a focus on a narrowly defined scope and immediate concerns, paying little attention to long-term impacts on a broader and holistic level. The consideration of gender in transport planning is a case in point – gender considerations are important in transport planning not only because there are significant differential impacts between men and women, but also because in the long run, these impacts in turn will have great economic and social implications. Economically, the lack of consideration of gender issues in public transport often results in increased travel time for women, leading to loss in productivity for the economy. Socially, difficulties and inaccessibility of public transport for women, particularly in relation to performing and balancing their care and work duties could also lead to increased stress and tensions, affecting family relations and wellbeing, would also incur considerable social costs. Policy planning tends to assume the position of policy makers and rarely considers the policy impacts from a user or benefactor perspective. In the case of public transport planning, how best an experiential perspective rigorously incorporate the users and gender point of view, will require not only consultation but also political will and commitment. A true incorporation of gender consideration into public transport planning will also require the support of other social policies including welfare policies. Hence, the thesis argues that new ways of researching, designing and planning for public transport as a gendered set of practices are required. Keywords public transport planning, gender-sensitive policy, gender equity, women and transport, feminism and transport planning, gender analysis, policy development, and feminist sociology. Australian and New Zealand Standard Research Classifications (ANZSRC) 120506 - Transport Planning (40%); 160512 - Social Policy (20%); and 169901 - Gender Specific Studies (40%).
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Engaging with Gender in Public Transport PlanningEvelyn H. Ybarzabal Unknown Date (has links)
Abstract This thesis investigates the extent to which gender considerations are being incorporated into the planning and policy making of the public transport system in Queensland, Australia. Using public transport in South East Queensland (SEQ) as a case study, this thesis analyses why and how gender issues are still being overlooked and excluded from mainstream planning. It investigates the application of a gender analysis approach in theory and practice and provides recommendations for integrating a gender perspective in the development of public transport policy. The study is beneficial in terms of making contributions to promote better understanding of how feminist theory could enhance the development of public transport policy. Both qualitative and quantitative research methods were employed. Participants were selected from different demographic groups (politicians, bureaucrats, academics, women’s subgroups and individuals from the broader community) using theoretical/purposive sampling methods. The collection and analysis of data were guided by feminist sociological theory as a framework and gender analysis was utilised in reviewing transport research, policies, programs, plans and legislation. The thesis findings showed that there are gender differentiated behaviours between men and women in relation to their transport needs. In particular, the manner in which men and women behave is linked to an array of underlying factors such as gender relations, the social role of women and their personal circumstances, household structure, transport-disadvantage issues, and their broader socio-economic environment. The research noted that gaps exist in the current public transport delivery in SEQ. Three main categories of issues were identified namely key gender issues, gender-obscured issues and gender-neutral issues. The key gender issues included personal safety and security, time-space pressured travel, lack of adequate facilities, driver’s knowledge, skills and attitudes, mobility-constraint issues and features of public transport that have gender impacts. The gender-obscured issues included language difficulty, cost and infrequency of service. The gender-neutral issues included but not limited to public transport design, unequal distribution of transport services and impacts specific to areas outside the TransLink network. The research highlights how the issues interlock with the social, economic, cultural, structural and political factors of the environment in which women and men live. The thesis concludes that there is a lack of effective engagement with women, and that greater attention to gender consideration in developing public transport policies is required. While Queensland State Government has made a commitment to improving public transport provision for women, it appears that such rhetoric has not yet been translated into practice. The research also noted that the practicality and political implications of transport policy seem to obtain a higher priority in decision-making domains than gender considerations. Failure to examine both ends of the gender continuum in service delivery will make more difficult the development of public transport policy as a gender-sensitive social policy. Furthermore, public transport policy making should not be undertaken in isolation from other planning activities. Other considerations outside the traditional planning approach have to be examined, so planners will have a greater appreciation of, not only the needs of the conventional public transport users, but also of those not belonging to this category including different subgroups of women. Policy planning often overlooks the construction of women as an homogenous category, without considering that they are a heterogeneous group with tremendous differences in age, ethnicity, religion and class, thus requiring different considerations for policy intervention. Policy planning has been constructed as an exercise with a focus on a narrowly defined scope and immediate concerns, paying little attention to long-term impacts on a broader and holistic level. The consideration of gender in transport planning is a case in point – gender considerations are important in transport planning not only because there are significant differential impacts between men and women, but also because in the long run, these impacts in turn will have great economic and social implications. Economically, the lack of consideration of gender issues in public transport often results in increased travel time for women, leading to loss in productivity for the economy. Socially, difficulties and inaccessibility of public transport for women, particularly in relation to performing and balancing their care and work duties could also lead to increased stress and tensions, affecting family relations and wellbeing, would also incur considerable social costs. Policy planning tends to assume the position of policy makers and rarely considers the policy impacts from a user or benefactor perspective. In the case of public transport planning, how best an experiential perspective rigorously incorporate the users and gender point of view, will require not only consultation but also political will and commitment. A true incorporation of gender consideration into public transport planning will also require the support of other social policies including welfare policies. Hence, the thesis argues that new ways of researching, designing and planning for public transport as a gendered set of practices are required. Keywords public transport planning, gender-sensitive policy, gender equity, women and transport, feminism and transport planning, gender analysis, policy development, and feminist sociology. Australian and New Zealand Standard Research Classifications (ANZSRC) 120506 - Transport Planning (40%); 160512 - Social Policy (20%); and 169901 - Gender Specific Studies (40%).
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Perceived Accessibility : Capturing the Traveller PerspectiveLättman, Katrin January 2016 (has links)
The main purpose of this thesis is introducing and proposing perceived accessibility as an important and so far overseen complement to conventional, objective accessibility in sustainable transport. Perceived accessibility is defined as the possibilities and ease of engaging in preferred activities using different transport modes. Implications for sustainable transport planning along with possible social outcomes related to perceived accessibility are also discussed. The thesis comprises two empirical studies. In Study I a psychometric measure (PAC) that captures perceived accessibility was developed and validated in three different datasets by exploratory and confirmatory factor analyses. All data was collected in Karlstad, Sweden in 2013 and 2014 with a total of 750 participants (bus travelers). Perceived accessibility is suggested as a complement to objective accessibility by contributing with the traveler perspective. Study II aimed at examining determinants of perceived accessibility focusing on service quality aspects, feelings of safety, age, and trip frequency. Study II used the same data as Study I in a conditional process model to look at the relations between perceived accessibility and its proposed determinants. Service quality and feelings of safety were found important predictors of perceived accessibility, and safety also explains part of the effect of quality on perceived accessibility. These relationships were not dependent on trip frequency (as in how often one travels by public transport). Age also predicted perceived accessibility, and a follow-up cluster analysis showed that elderly and people in their thirties experience significantly lower perceived accessibility than other age groups. / Denna licentiatuppsats behandlar upplevd tillgänglighet, det vill säga resenärsperspektivet på tillgänglighet, som ett viktigt komplement till konventionell (objektiv) tillgänglighet inom hållbart resande. Uppsatsen introducerar upplevd tillgänglighet och dess nytta och plats i forskningen samt implikationer för planering och utvärdering av hållbara transporter. Vidare behandlas påverkansfaktorer för upplevd tillgänglighet samt relaterade individuella utfall som subjektivt välbefinnande och social exkludering/inkludering utifrån teori och empiri. Uppsatsen innefattar två empiriska studier. Studie I utvecklar och testar ett psykometriskt mätinstrument för upplevd tillgänglighet med data från tre enkät-tillfällen (n= 750) i Karlstad. Dataset 1 analyserades med explorativ faktoranalys för att få fram ett instrument som fångar upplevd tillgänglighet (PAC) och validerades därefter i två dataset. Studie II avsåg att undersöka vad som bidrar till upplevd tillgänglighet med fokus på kvalitetsattribut i resan (service quality), resenärens upplevda trygghet, samt ålder och resvana. Samma data som i studie I användes i en conditional process model för att undersöka sambanden, samt i en klusteranalys för att ytterligare undersöka skillnader i resultatet mellan olika grupper av resenärer. Resultatet visar att upplevd tillgänglighet kan ha betydelse som komplement till befintliga mätningar och utvärderingar av tillgänglighet genom att bidra med resenärsperspektivet. Ett antal påverkansfaktorer för upplevd tillgänglighet kan konstateras, däribland kvalitet samt resenärens upplevda känsla av trygghet. Betydelsen av kvalitet för tillgänglighet är densamma oavsett hur ofta man reser, däremot upplever de som reser ofta en signifikant högre tillgänglighet än de som reser sällan. Äldre resenärer och resenärer i 30-årsåldern påvisar signifikant lägre upplevd tillgänglighet. / This thesis proposes perceived accessibility as a complement to conventional accessibility in sustainable transport planning and evaluation. Perceived accessibility is defined as the possibilities and ease of engaging in preferred activities using different transport modes and captures the traveller experience and perspective of accessibility. The thesis introduces an instrument for measuring perceived accessibility (PAC) along with determinants for perceived accessibility, such as feelings of safety, age, and perceived quality. Related social outcomes such as social inclusion and subjective well-being are discussed, along with possible implications for transport planning and suggestions for future research.
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Assessing the Environmental Impacts of Shared Autonomous Electric Vehicle Systems with Varying Adoption Levels Using Agent-Based ModelsMustafa Lokhandwala (6912740) 14 August 2019 (has links)
<div>In recent years, there has been considerable growth in the adoption and technology development of electric vehicles (EV), autonomous vehicles (AV), and ride sharing (RS). These technologies have the potential to improve transportation sustainability. Many studies have evaluated the environmental impacts of these technologies but the existing literature has three major gaps: (1) the adoption of these three technologies need to be evaluated considering their impact on each other, (2) many existing models do not evaluate systems on a common ground, and (3) the heterogeneous preferences of riders towards these emerging technologies are not fully incorporated. To address these gaps, this work studies and quantifies the environmental and efficiency gains that can be gained through these emerging transportation technologies by developing a Parameterized Preference-based Shared Autonomous Electric Vehicle (PP-SAEV) agent-based model. The model is then applied to a case study of New York City (NYC) taxis to evaluate the system performance with increasing AV, EV, and RS adoption.</div><div><br></div><div>The outputs from the PP-SAEV model show that replacing taxi cabs in NYC with AVs along with RS potentially can reduce CO\textsubscript{2} emissions by 866 metric Tones per day and increase average vehicle occupancy from 1.2 to 3 persons in vehicles with passenger seating capacity of 4. A prediction model based on the PP-SAEV output recommends that 6000 vehicles are needed to maintain the current level of service with 100\% AV and RS adoption using capacity 4 taxis. Taxi fleets with capacity 4 with high RS and low AV adoption are also found to have the least CO\textsubscript{2} emissions. Because the heterogeneous sharing preferences of riders have shown as the major limiting factor to ride sharing, these heterogeneous sharing preferences are further modelled. The results show that high service levels are achieved when all the riders are open to sharing, and the maximum service level is reached when 30\% of riders will only accept shared rides and 70\% of the riders are either indifferent to sharing or prefer to use ride sharing over riding alone. Additionally, the service level and waiting time of riders that are inflexible (will accept only shared or non-shared rides) are greatly impacted by varying mix of riders with different sharing preference. Finally, an optimization model was built to site charging stations in a system with continually increasing EV adoption. Using the best charging station locations, transforming a fleet of autonomous or traditional vehicles to electric vehicles does not significantly change the system service level. The results show that increasing the EV adoption in fleets with 100\% RS and AV adoption reduced the daily CO\textsubscript{2} emissions by about 861 Tones and transforming a fleet of traditional taxi cabs to electric taxi cabs reduced the daily CO\textsubscript{2} emissions by 1100 Tones.</div><div><br></div><div>In summary, this dissertation evaluates the potential growth of autonomous vehicles, ride sharing, and electric vehicles in systems where riders may have heterogeneous sharing preferences, from a system performance`s perspective and assesses the environmental impacts. The developed model and the insights gained from this study can inform policy makers to develop sustainable transportation systems incorporating the emerging transportation technologies.</div>
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Identificação e caracterização de grupos de indivíduos segundo padrões de seqüências de atividades multidimensionais. / Identification and characterization of groups of individuals according to patterns of multidimensional activity sequences.Dalmaso, Ricardo Curvello 30 April 2009 (has links)
O presente estudo procura identificar grupos homogêneos de indivíduos quanto aos padrões de seqüências de atividades diárias que estes realizam. As atividades são caracterizadas por múltiplos atributos, fazendo com que as seqüências sejam multidimensionais. Como atributos, ou características, são considerados a natureza da atividade realizada, ou motivo da viagem, e o período de realização da mesma, ambos separados em categorias. É estudado o efeito da inclusão da forma de acesso à atividade, ou modo de viagem, como uma terceira dimensão. Este atributo, entretanto, dados os resultados obtidos, não é utilizado nas análises finais. É também considerada a adoção de diferentes categorizações para a dimensão motivo. São usados dados da pesquisa Origem e Destino realizada em 1997, na Região Metropolitana de São Paulo. No trabalho são considerados os indivíduos com 12 anos ou mais, com pelo menos duas viagens diárias e com seqüência de viagens iniciada e terminada em sua residência, sem inconsistências internas. O número de indivíduos que atende a estes critérios é 49.616. A classificação, ou agrupamento, das seqüências de atividades em classes ou grupos é feita considerando uma medida de distância ou dissimilaridade calculada entre as seqüências, que é baseada no esforço necessário para igualá-las. Esta medida é chamada de OT-MDSAM (uni-dimensional Optimum Trajectories-based MultiDimensional Sequence Alignment Method). A partir da matriz de dissimilaridades é executado um processo estatístico de agrupamento hierárquico aglomerativo usando o Método de Ward. Os grupos de seqüências formados são analisados considerando características das próprias seqüências e atributos sóciodemográficas e econômicas dos indivíduos que os compõem, e usados em um modelo de segmentação do tipo árvore de decisão, usando o CHAID (Chi-square Automatic Interaction Detector). Resultados indicam que os grupos formados são bastante homogêneos quanto aos padrões de seqüências de atividades que representam e aos indivíduos associados a eles. / The main objective of the dissertation is to identify homogeneous groups of individuals, with regard to the daily activity/travel sequences performed in a weekday. Activities are characterized by multiple attributes, thus generating mutidimensional seguences. In this study, the nature of the activity (travel purpose) and the starting period of engagement in the activity (ending time of a trip) were the dimensions considered in the characterization of activities. Access mode to the activity was also considered as a third dimension, but the results had led to the decision not to include it in the final analysis. Alternative categorizations of the activity nature dimension were also studied, that resulted in further disaggregation than adopted in previous analyses of the same data. The study used data from the 1997 Origin-Destination household survey of the Sao Paulo Metropolitan Area. The analysis considered all individuals aged 12 or over that conducted two or more trips (starting and ending at home) on the survey day, resulting in a sample of 49,616 individuals. A sequence alignment method - OT-MDSUM (uni-dimensional Optimum Trajectories-based MultiDimensional Sequence Alignment Method) - was used to compare and calculate distances between pairs of different activity/travel sequences. These distances were then fed into a Ward hierarchical clustering algorithm to create classes of groups of activity/travel patterns. These groups were then analyzed according to the characteristics of the activity/travel sequences included and to the sociodemographic and economic characteristics of individuals who performed these patterns. The data were then utilized to develop a decision tree model using CHAID - Chi-Squared Automatic Interaction Detector, having the group of activity/travel sequences as the response variable and the characteristics of individuals and their families as independent variables. The results indicate that the groups formed through this procedure present a good degree of homogeneity regarding the activity patterns they represent and that they can be clearly associated to the characteristics of the individuals which perform these patterns.
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A importância da variabilidade do tempo de viagem no acesso terrestre a aeroportos: estudo de caso do Aeroporto Internacional André Franco Montoro. / The importance of travel time variability in airport ground access: study case - André Franco Montoro International Airport.Alves, Bianca Bianchi 26 September 2005 (has links)
Esta dissertação discute as questões de acesso terrestre a aeroportos. Em particular, estima a influência do fator de variabilidade do tempo de viagem na escolha modal de acesso terrestre ao Aeroporto Internacional André Franco Montoro, em Guarulhos, Região Metropolitana da Cidade de São Paulo (RMSP). Para isso, foi aplicada uma pesquisa de preferência declarada com 108 viajantes aéreos, realizada nas salas de embarque do referido aeroporto. Foram entrevistados apenas residentes da RMSP e predominantemente viajantes aéreos internacionais. Foram coletados também dados revelados: dados do indivíduo, do acesso terrestre realizado e da sua viagem aérea. Para a coleta dos dados de preferência declarada foi elaborado um experimento fatorial ortogonal de escolha. Cada indivíduo era questionado a proceder à ordenação de conjuntos de 4 alternativas, uma para cada modo considerado: automóvel, táxi e o serviço de ônibus existente, e um novo serviço proposto, um trem expresso ligando o aeroporto ao centro da cidade de São Paulo. As alternativas foram descritas pelos atributos de custo, tempo de viagem médio e variabilidade do tempo de viagem, expressa através de uma margem de segurança. Todos os atributos foram apresentados em 3 níveis. Com os dados coletados foram estimados modelos do tipo Logit Multinomial para diversos segmentos da amostra, estratificados por motivo de viagem (lazer ou trabalho), gênero, modo utilizado no acesso (carro ou táxi) e freqüência de viagens aéreas (alta ou baixa). Foram estimados modelos estatisticamente significativos para o segmento dos homens que viajaram nas sextas-feiras e para o segmento dos homens que utilizaram táxi no acesso ao aeroporto. Para estes casos, os coeficientes de margem de segurança e custo foram significativos, permitindo a estimação do valor de se melhorar a confiabilidade do tempo de viagem. A metodologia empregada neste trabalho pode ser estendida para incluir os outros segmentos dos usuários do aeroporto e permite uma melhor estimação da demanda para o trem expresso proposto. / The dissertation discusses and analyzes issues relating to ground access to airports, focusing on the importance of travel time reliability on the choice of transport mode for access to the André Franco Montoro International Airport of São Paulo, in Guarulhos. A stated preference survey was conducted with 108 air travelers waiting for departure at the André Franco Montoro Airport. Passengers interviewed had to be residents of the Metropolitan Regions of São Paulo; most individuals in the sample were traveling to international destinations. Revealed preference data about the trip to the airport as well as data about the air travel and other passenger attributes were collected. The stated preference survey was based on an orthogonal factorial design choice experiment. Each individual was asked to perform a ranking exercise on sets of 4 alternatives, one for each of the modes considered: auto, taxi and the existing bus service, and a new proposed express train linking the airport to the central area of São Paulo. Attributes describing each mode were cost, average travel time and a measure of travel time reliability, expressed as a safety margin, all factors presented in three levels. Multinomial Logit Models were estimated for several segments of the sample, stratified by purpose (leisure or work), gender, access mode (auto or taxi) and frequency of air travel (high or low). In general, average travel time and travel time reliability (safety margin) could not be jointly included in the models. Models segmented by trip purpose, gender or trip frequency did not present significant coefficients for safety margin or cost attributes. Valid and interesting models were estimated for the segment of men traveling on Fridays and for men using taxi as the access mode to the airport. In these cases, safety margin and travel cost coefficients were significant, allowing the estimation of the value of improving reliability of travel time. The methodology applied can be extended to include other segments of airport users and improve demand estimation for the proposed airport express train.
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Indicadores de desempenho de frota de empresas agroindustriais canavieiras brasileiras. / Fleet performance indicators of brazilian sugarcane agro-industrial enterprises.Pinto, Ricardo Soares de Arruda 08 October 2002 (has links)
Este trabalho tem como objetivo avaliar um conjunto proposto de indicadores analítico-descritivos e de avaliação de desempenho para frotas de agroindústrias canavieiras brasileiras, já que o Brasil, conforme Lucchesi (1995), é o maior produtor mundial de cana e esta cultura, segundo Paixão (1994), dá trabalho a 3% do total de pessoas empregadas no meio rural do país. Para a coleta de dados dos testes, um questionário foi aplicado para as 323 usinas de açúcar e álcool brasileiras existentes entre 1998 (safra 1997/1998) e 2000 (safra 1999/2000). Na safra 1997/1998, 67 empresas participaram, enquanto foram 73 na safra 1998/1999 e novamente 73 unidades produtoras na safra 1999/2000. Os resultados obtidos mostraram a efetividade dos indicadores sugeridos como ferramenta de gerenciamento das frotas canavieiras, além de mostrarem a tendência das frotas das agroindústrias canavieiras de envelhecimento entre 1997/1998 e 1999/2000 e também de crescimento da sua terceirização. Os resultados também apontam para uma tendência dentre as empresas de crescimento da área com colheita mecanizada e do plantio mecanizado. / The present work is aimed at evaluating a group of proposed analytical-descriptive and performance indicators in Brazilian agro-industry sugarcane fleets. Brazil is the worlds greatest sugarcane producer (Lucchesi, 1995) and this activity employees 3% of the rural labor in the country (Paixão, 1994). The data for testing the proposed group of indicators were collected by means questionnaires filled in by sugarcane agro-industries between 1998 (1997/1998 crop) and 2000 (1999/2000 crop). The number of companies involved in the research were 67, 73 and 73 during the 1997/1998, 1998/1999 and 1999/2000 crops, respectively. The results showed that the evaluated indicators can be used as an effective toll for sugarcane fleets management, besides evidencing an aging tendency of the fleets between 1997/1998 and 1999/2000, as well as an increase in outsourcing. The results also showed a trend toward mechanized planting and mechanized harvest in sugarcane enterprises.
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Chicago; São Paulo: contribuição ao estudo do transporte coletivo no processo de urbanização / Chicago; São Paulo: contribution to the study of urban transport in the urbanization processSilveira, Tácito Pio da 09 May 2008 (has links)
A percepção de diferenças acentuadas entre os padrões de urbanização de cidades aparentemente comparáveis no contexto da economia de mercado levanta questões, e demanda interpretação. A pesquisa que embasa a dissertação surgiu de indagação dessa natureza, motivada por uma viagem a Chicago. O confronto inevitável da qualidade urbana e, em particular, da excelência do serviço de transporte daquele pólo econômico norte-americano com os quadros correspondentes de São Paulo, importante centro de produção nacional, conduziu à busca de uma razão, não para a diferença em si entre os respectivos espaços, mas para os fatores que a produzem, a validam e a sustentam ao longo do tempo. A proposição orientou a pesquisa para a história da produção do espaço americano, no processo de conquista de seu regime autônomo de acumulação, colocando Chicago simultaneamente como foco e eixo ordenador de seu desenvolvimento. A dissertação foi organizada em quatro partes. A Introdução apresenta o tema, e aponta seus contornos teóricos. O Capítulo I acompanha a formação de Chicago no quadro da constituição do espaço nacional americano. O Capítulo II descreve o serviço de transporte daquela cidade, destacando a maciça presença do Estado americano em sua provisão. A Conclusão retoma os temas principais da pesquisa para refleti-los no contexto da região metropolitana de São Paulo. / The perception of accentuated differences in urbanization patterns between apparently comparable cities, in the light of the present market economy context, raises several issues and therefore demands further interpretation. The research that embodies this dissertation was born from such inquiry, motivated by a trip to Chicago. The inevitable comparison of the urban qualities, particularly of the excellent public transportation, enjoyed by the North-American economic centre with the correspondent features of São Paulo, important productive centre nationally, has led to the search for an explanation. Not of the difference between the respective spaces, but of the factors that produce it, validate it and preserve it throughout time. The development of the case study - the formation of Chicago - has opened up new perspectives for the inclusion of the historic dimension contemplating the differences in the struggles that led to the building of the American state, through its autonomous accumulative regime. The dissertation has been divided into four parts. The introduction presents the theme and delimits its theoretical guidelines. Chapter I follows the formation of Chicago in the light of the formation of the American national space. Chapter II describes the public transportation facilities of the city, underlining the massive presence of the State in its provision. The conclusion takes back some of the central themes of the research in order to compare them to the metropolitan area of São Paulo.
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