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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Developing a mode choice model for New Zealand freight transportation.

Kim, Hyun Chan January 2014 (has links)
The aim of this research was to construct a freight mode choice model, from the perspective of New Zealand freight shippers, identifying the possibility of mode substitution effects. Shipper’s freight modal choice depends on freight demand and infrastructure as well as the quality of service characteristics of alternative modes, such as transport cost, delivery time, reliability, damage and loss and frequency of service. Freight logistics characteristics, such as the attributes of the shipper, the attributes of the commodities to be transported, and the spatial attributes of shipments, strongly influence modal choice. In New Zealand, due to the heterogeneity of firms and issues of confidentiality and reliability of data, relatively little research has been done on modelling freight mode choice. This research involved revealed preference (RP) and stated preference (SP) surveys of representative freight shippers and agents. User-specific data make it possible to better identify the dependence between shipper’s mode shift behaviour and freight logistics in New Zealand circumstances. Moreover, by applying a discrete choice approach, the possibility of mode substitution effects was investigated. This research approach was prompted by substantial changes in New Zealand’s freight transport patterns due to the increasing use of logistic processes, and previously developed models using a four-stage approach fail to model elements of firms’ characteristics (i.e. size of shipments, delivery distance, export volume, product shelf-life, size and location of firm, number of road fleets, and relationship with contracted carriers). The outcomes of this research have shown that many of the operational and logistical influences that affect mode choice vary with the shipper and the industry. As a result, public policy makers should recognize that effective policy must consider both the needs of the transportation service provider and user. In particular, the public policy maker should recognize that freight transport mode choice results from an array of interactions among transportation characteristics, logistics characteristics and product characteristics.
12

Jsou žraloci cennější živí nebo mrtví? Analýza projevených preferencí ohledně ekoturistiky a výprav za žraloky v Kostarice. / Are Sharks Worth More Alive Than Dead? A Stated Preference Study on Shark Ecotourism in Costa Rica.

Berrios, Alicia Maria January 2017 (has links)
i Charles University Faculty of Social Sciences Institute of Economic Studies MASTER'S THESIS Are Sharks Worth More Alive Than Dead? A Stated Preference Study on Shark Ecotourism in Costa Rica. Author: Bc. Alicia Maria Berrios Supervisor: Mgr. Milan Ščasný PhD. Academic Year: 2016/2017 ii Declaration of Authorship The author hereby declares that he compiled this thesis independently; using only the listed resources and literature, and the thesis has not been used to obtain a different or the same degree. The author grants to Charles University permission to reproduce and to distribute copies of this thesis document in whole or in part. Prague, January 01st , 2017 Signature iii Acknowledgments With boundless appreciation, I would like to extend my gratitude to Mgr. Milan Ščasný PhD., for his incredible support in writing this research. He spent a countless number of hours on this thesis work, and ultimately, this research wouldn't have been possible without him. I would also like to express my gratitude to Carlos Avila, for his generosity in helping me conduct the in-person interviews. I would also like to express my gratitude to Prof. Melville Saayman, who helped tremendously in the experimental design of this work. Thank you to Mgr. Martin Kryl for programming the survey instrument. Lastly, I would like to...
13

Contribution of an emission trading scheme to reduce road traffic induced CO2 emissions in Austria

Link, Christoph, Stark, Juliane, Sonntag, Axel, Hössinger, Reinhard 14 July 2012 (has links) (PDF)
The Emission Trading Scheme for green house gases is a key tool of European climate protection. Including the road transport sector might be a promising strategy to limit its CO2 emissions. This could be realized within a common market (trans-sectoral trading permitted) or separated markets (trans-sectoral trading not permitted). Starting from different assumptions on emission reduction objectives, the impact of both options is analyzed using a quantitative model. Although an emission trading scheme is ecologically effective regardless of the trading model, it turns out that CO2 emissions and emission allowance prices differ strongly between both design options due to sector specific price elasticities of allowance demand. (authors' abstract)
14

Community perception and valuation of Southern Illinois University Campus Lake as a recreation space and educational tool

Steiger, Rachel L 01 May 2019 (has links)
Changing lake conditions due to cyanobacterial harmful algal blooms (CyanoHABs) have prompted inconsistent and evolving management and recreational use of Southern Illinois University’s Campus Lake. The objective of this study was to address the need for understanding lake-user demographics, CyanoHAB and Campus Lake perception, and support for potential Campus Lake programs. I accomplish this by implementing and summarizing Lake-User and Student Questionnaires, applying an Experience Use History (EUH) method to categorize respondents, and utilizing university resources to understand the effects of environmental variables on perception of Campus Lake. Respondent demographics fit typical leisure participation, where most lake users were encountered walking/jogging. Students participating in the Campus Lake Sustainable Eco-Recreation program self-report a higher familiarity with lake water quality and CyanoHABs than non-participants. There was little evidence of Nature Deficit Disorder, and no difference in support for hypothetical management action options based on this factor. Backwards stepwise regression analysis of stated choice management action support for two hypothetical lake management plans resulted in a proscriptive outcome. EUH results modeled expected sociodemographic characteristics, and Beginners showed support for increasing recreation activity to support hypothetical lake management. Perceptions of Campus Lake water quality status were best correlated with visible algal growth, Temperature-Heat-Solar radiation-Wind index, and mean prior 24 hr relative humidity variables. This Campus Lake survey should be used to diversify lake accessibility and recreation programs targeted towards minority and special interest groups. Surveying of natural resource user perceptions, especially in the case of shifting quality, is a valuable tool to monitor and capitalize on public interest.
15

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.
16

Investigating the criterion validity of contingent valuation-willingness to pay methods

Kanya, Gladys Lucy Wanjiru January 2018 (has links)
With theoretical foundations in welfare theory, the cost benefit analysis (CBA) technique is a powerful tool for assessing benefits particularly where markets do not exist or would fail (for example due to the existence of public goods) or have become potentially politically excluded (such as the health sector). Unlike other economic evaluation techniques, costs and benefits are measured in monetary terms allowing for comparisons within and between different sectors of the economy for resource allocation decisions. Using contingent valuation (CV) techniques, people's preferences for goods are determined by finding out what they would be willing to pay (WTP) for specified benefits or improvements; or accept (WTA), as compensation for withdrawal or loss of benefit. While the use of WTP methods has grown in other sectors, the uptake in health has been limited. A long-standing criticism is that stated WTP estimates may be poor indicators of actual WTP, calling into question their validity and the use of such estimates for welfare valuation. The aim of this thesis is to investigate the criterion validity of CV-WTP studies. A four-pronged approach including critical appraisals of the available literature and evidence on criterion validity and empirical analyses was adopted. The thesis established the scarcity in criterion validity assessments, particularly in the health sector and that evidence on the criterion validity of CV-WTP is more varied than authors are presenting. The variety in the methods used to assess and report criterion validity assessments is demonstrated. Further, the impact of the analysis of hypothetical WTP on criterion validity assessments and conclusions thereof is demonstrated. The empirical analyses further demonstrate the differences in predictions and predictors of WTP analyses, discussing the effect of these on criterion validity assessments and conclusions. Finally, the thesis offers suggestions for the reporting of criterion validity assessments, in efforts to improve the method.
17

Botniabanan - förväntningar i tid och rum på regional utveckling och resande

Brandt, Backa Fredrik January 2005 (has links)
<p>The aim of the thesis is twofold: to analyze the effects of the expectations on the Bothnia Line on the housing market and expectations on railway use. To fulfill these aims, three questions are considered:</p><p>1. To what extent is property prices influenced by the expected effects of the Bothnia Line?</p><p>2. Are there differences in expectations on regional development and future journeys between residents in different locations and with different individual characteristics?</p><p>3. How are trips to work affected by the expectations on the Bothnia Line and the performance of the train service according to residents in different locations?</p><p>Property prices are investigated quantitatively with data delivered from Lantmäteriet. The data contains every sold property from 1994 to 2001 in the municipalities of Umeå, Nordmaling, and Örnsköldsvik. Expectations on regional development and future traveling on the Bothnia Line were investigated with two questionnaires conducted in the autumn of 2002.</p><p>The empirical results from the study of property prices are clear. There are no signs of influence from the Bothnia Line on the property prices close to the railway stations or in the proximity of the railway.</p><p>The empirical results from the questionnaires reveal a mixed picture of the expectations. In the municipalities located furthest away from the railway, the expectations are low. On the contrary, a large proportion (>75 %) of the residents in municipalities along the railway line believe it can be useful for the population in general when searching for new employment opportunities. This is especially true for males living in Örnsköldsvik. A significantly smaller proportion (≈25 %) believes they will use the railway themselves.</p><p>One explanation to the geographic variations is that they are a result from an ongoing diffusion process. Residents in Örnsköldsvik were the first ones to have a visual image of the railway since the construction started there. As the construction continues, the expectations might increase in other locations as well. Another possibility is that people only react on word of mouth from someone that actually made a trip before they consider changing the mode of transport. If that is the case, the expectations will increase only after the opening of the railway line.</p><p>With the exception of residents in Nordmaling, expectations on future journeys with the Bothnia Line are low. The low expectations on journeys on the Bothnia Line might be explained by the lack of attraction between the places along the line. They are satisfied with their present situation and cannot find any rationale to consider other alternatives. It is a different story if they are forced to consider other alternatives. The result from a stated preference study shows that if they are offered employment at another place, the majority is willing to commute.</p>
18

Motorists´evaluation of road maintenance management

Olsson, Camilla January 2003 (has links)
The road network is extremely valuable. Road Administrationsare expected to invest maintenance funding in a way thatreturns maximum benefit to road users. Cost-benefit analysis isone method to ensure that an adequate return in terms ofbenefits results from committing expenditure. Today,cost-benefit calculations are frequently used as a base fordecision making of investments. The surges for such methods inthe maintenance management sector are increasing. Up to the present, one reason for not analysing costs andbenefits for various maintenance management measures has beenthe lack of knowledge about comfort benefits for road users inquantitative monetary terms. The aim with this thesis is toinvestigate motorists’apprehension of pavementmaintenance management and winter maintenance operations. Thefinal goal is to find out their willingness to pay fordifferent levels of road maintenance management. Those valuescan later be used in cost-benefit calculations and also ineffect models of road maintenance management. Due to the pioneer status of this study, focus groups andin-depth interviews as well as a number of pilot studies havebeen carried out before a main survey with stated choiceexperiments could be designed. These exploratory studies showedthat the interviewees were familiar with the types of roadsurface damage that exist and in many cases mastered the sameterminology as the Road Administration and others. Showingpictures of well-known types of road damage lead to highermonetary valuations of getting better road standard incomparison with just text descriptions. One reason for thatcould be the requisite severness of the damage in order toillustrate a certain road maintenance shortage. The respondentswith the text descriptions could have stated their preferencesfor an, in their own minds, average shortcoming while the groupwith access to photograph of road damage all saw the samesevere damage. Illustrations of different road maintenancestandards make it possible to control the respondentsinterpretation of the maintenance management standard valuatedbut could lead to high monetary estimations. Driving comfort was very important to the interviewees inthe exploratory studies. That was manifested in the pilotstated choice surveys, which resulted in high willingness topay for better pavement management. The main study consisted of two surveys; the first one wasabout pavement maintenance management and was carried out inOctober to November 2000 and the second one took place inFebruary to March 2001 and was about winter maintenanceoperations. Both the pavement and the winter survey includedattitude questions and two stated choice experiments. Theresult showed that the maintenance management status of theroad network was important to car users. For example, the worstpavement damage was roughness; the motorists were willing topay 1.7 SEK (Swedish Crowns) per kilometre to avoid roadsdamaged in their full length. The least harmful damage of thosestudied was cracks; the willingness to pay to avoid that was0.5 SEK per kilometre. For more rapid snow clearance, the carusers were willing to pay 60 to 80 SEK per year for getting theroads cleared from snow one hour earlier than the currentstandard implies. The willingness to pay for driving on bareroads in comparison with snow roads was 0.4 SEK per kilometre.Statistical tests on the models showed that the parametervalueswere well estimated. In the pavement as well as in the winter survey, a clustergroup analysis was performed in order to test the heterogeneityof attitudes and behaviour to road maintenance management. Theanalysis resulted in two separate groups in each survey. Onegroup consisted of drivers who reported to be very influencedby the level of maintenance management regarding chosen speed,joy of driving and so on. The other group reported to be lessinfluenced and had lower acceptance of higher road tax for thepurpose to increase the maintenance management standard.Separate stated choice models revealed that the differences inattitudes could also reflect the respondents’willingnessto pay for higher road maintenance standard. However, thedifferences were only small and the different groups’monetary valuations were not found to be significantlydifferent from each other. The result of this study, better knowledge aboutmotorists’apprehension of maintenance management, theirattitudes to driving comfort and road standard and theirmonetary valuations of different levels of pavement maintenanceand winter maintenance operations, opens up the possibility tomake cost-benefit analysis of various maintenance managementprojects. The impact of the monetary values found in this studyhas been studied in a limited cost-benefit analysis. <b>Keywords:</b>stated choice, stated preference, valuationsof maintenance management, driving comfort, road standardevaluation
19

Botniabanan - förväntningar i tid och rum på regional utveckling och resande

Brandt, Backa Fredrik January 2005 (has links)
The aim of the thesis is twofold: to analyze the effects of the expectations on the Bothnia Line on the housing market and expectations on railway use. To fulfill these aims, three questions are considered: 1. To what extent is property prices influenced by the expected effects of the Bothnia Line? 2. Are there differences in expectations on regional development and future journeys between residents in different locations and with different individual characteristics? 3. How are trips to work affected by the expectations on the Bothnia Line and the performance of the train service according to residents in different locations? Property prices are investigated quantitatively with data delivered from Lantmäteriet. The data contains every sold property from 1994 to 2001 in the municipalities of Umeå, Nordmaling, and Örnsköldsvik. Expectations on regional development and future traveling on the Bothnia Line were investigated with two questionnaires conducted in the autumn of 2002. The empirical results from the study of property prices are clear. There are no signs of influence from the Bothnia Line on the property prices close to the railway stations or in the proximity of the railway. The empirical results from the questionnaires reveal a mixed picture of the expectations. In the municipalities located furthest away from the railway, the expectations are low. On the contrary, a large proportion (&gt;75 %) of the residents in municipalities along the railway line believe it can be useful for the population in general when searching for new employment opportunities. This is especially true for males living in Örnsköldsvik. A significantly smaller proportion (≈25 %) believes they will use the railway themselves. One explanation to the geographic variations is that they are a result from an ongoing diffusion process. Residents in Örnsköldsvik were the first ones to have a visual image of the railway since the construction started there. As the construction continues, the expectations might increase in other locations as well. Another possibility is that people only react on word of mouth from someone that actually made a trip before they consider changing the mode of transport. If that is the case, the expectations will increase only after the opening of the railway line. With the exception of residents in Nordmaling, expectations on future journeys with the Bothnia Line are low. The low expectations on journeys on the Bothnia Line might be explained by the lack of attraction between the places along the line. They are satisfied with their present situation and cannot find any rationale to consider other alternatives. It is a different story if they are forced to consider other alternatives. The result from a stated preference study shows that if they are offered employment at another place, the majority is willing to commute.
20

Development of Improved Traveler Survey Methods for High-Speed Intercity Passenger Rail Planning

Sperry, Benjamin 2012 May 1900 (has links)
High-speed passenger rail is seen by many in the U.S. transportation policy and planning communities as an ideal solution for fast, safe, and resource-efficient mobility in high-demand intercity corridors. To expand the body of knowledge for high-speed intercity passenger rail in the U.S., the overall goal of this dissertation was to better understand the demand for high-speed intercity passenger rail services in small- or medium-sized intermediate communities and improve planners' ability to estimate such demand through traveler surveys; specifically, the use of different experimental designs for stated preference questions and the use of images to describe hypothetical travel alternatives in traveler surveys. In pursuit of this goal, an Internet-based survey was distributed to residents of Waco and Temple, two communities located along the federally-designated South Central High-Speed Rail Corridor in Central Texas. A total of 1,160 surveys were obtained from residents of the two communities. Mixed logit travel mode choice models developed from the survey data revealed valuable findings that can inform demand estimates and the design of traveler surveys for high-speed intercity passenger rail planning activities. Based on the analysis presented in this dissertation, ridership estimates for new high-speed intercity passenger rail lines that are planned to serve intermediate communities should not assume that residents of these communities have similar characteristics and values. The d-efficient stated preference experimental design was found to provide a mode choice model with a better fit and greater significance on key policy variables than the adaptive design and therefore is recommended for use in future surveys. Finally, it is recommended that surveys should consider the use of images of proposed train services to aid respondent decision-making for stated preference questions, but only if the images used in the survey depict equipment that could be realistically deployed in the corridor.

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