964 resultados para travel mode choice


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We examine the choice of modes of delivery in services based on US data, including both cross-border exports and sales through foreign affiliates. We focus on characteristics of destination markets and how this impacts on mode choice. We find that market size, distance and policy all play a role in where firms establish, and in how many markets firms enter. The importance of sales through affiliates relative to total foreign sales also depends on factors like market size, geographic and economic distance and the policy regime in place. Precisely, how important these factors are depends on the sector in question.

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Applications involving travel behavior from the perspective of land use are dating from the 1990s. Usually, four important components are distinguished: density, diversity and design (3D?s of Cervero and Kockelman) and accessibility (introduced by Geurs and van Wee). But there is not a general agreement on how to measure each of those 4 components. Density is used to be measured as population and employment densities, but others authors separate population density between residential and building densities. A lot of measures have been developed to estimate diversity: among others, a dissimilarity index to indicate the degree to which different land uses lie within one another?s surrounding, an entropy index to quantify the degree of balance across various land use types or proximities to commercial-retail uses. Design has been characterized by site design, and dwelling and street characteristics. Lastly, accessibility has become a frequently used concept, but its meaning on travel behavior field always refers to the ability ?to reach activities or locations by means of a travel mode?, measured as accessibility to jobs, to leisure activities, and others. Furthermore, the previous evidence is mainly based on US data or on north European countries. Therefore, this paper adds some new evidence from a Spanish perspective to the research debate. Through a Madrid smartphone-based survey, factor analysis is used to linearly combine variables into the 3D?s and accessibility dimensions of the built environment. At a first step for future investigations, land use variables will be treated to define accurately the previous 4 components.

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This study investigates the effect of price and travel mode fairness and spatial equity in transit provision on the perceived transit service quality, willingness to pay, and habitual frequency of use. Based on the theory of planned behavior, we developed a web-based questionnaire for revealed preferences data collection. The survey was administered among young people in Copenhagen and Lisbon to explore the transit perceptions and use under different economic and transit provision conditions. The survey yielded 499 questionnaires, analyzed by means of structural equation models. Results show that higher perceived fairness relates positively to higher perceived quality of transit service and higher perceived ease of paying for transit use. Higher perceived spatial equity in service provision is associated with higher perceived service quality. Higher perceived service quality relates to higher perceived ease of payment, which links to higher frequency of transit use.

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This paper focuses on the design of railway timetables considering a variable elastic demand profile along a whole design day. Timetabling is the third stage in the classical hierarchical railway planning process. Most of previous works on this topic consider a uniform demand behavior for short planning intervals. In this paper, we propose a MINLP model for designing non-periodic timetables on a railway corridor where demand is dependent on waiting times. In the elastic demand case, long waiting times lead to a loss of passengers, who may select an alternative transportation mode. The mode choice is modeled using two alternative methods. The first one is based on a sigmoid function and can be used in case of absence of information for competitor modes. In the second one, the mode choice probability is obtained using a Logit model that explicitly considers the existence of a main alternative mode. With the purpose of obtaining optimal departure times, in both cases, a minimization of the loss of passengers is used as objective function. Finally, as illustration, the timetabling MINLP model with both mode choice methods is applied to a real case and computational results are shown.

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The afternoon of a faun.--Old man Minick.G̲̲igolo.--Not a day over twenty-one.--Home girl.--Ain't nature wonderful!--The sudden sixties.--If I should ever travel!

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Transportation Department, Joint Program Office for Intelligent Transportation Systems, Washington, D.C.

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Federal Highway Administration, Washington, D.C.

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Federal Transit Administration, Washington, D.C.

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v. 1-2. Twice-told tales. -- v. 3. The snow-image and other twice-told tales. -- v. 4. Mosses from an old manse. -- v. 6. The scarlet letter. -- v. 7. The house of the seven gables. -- v. 8. The Blithedale romance. -- v. 9-10. The marble faun; or, The romance of Monte Beni. -- v. 11. Our old home. -- v. 12. The whole history of grandfather's chair, and Biographical stories. -- v. 13. A wonder book for girls and boys, and Tanglewood tales. -- v. 14. The Dolliver romance and kindred tales. -- v. 15. Doctor Grimshaw's secret, ed. with preface and notes by Julian Hawthorne. -- v. 16. Tales and sketches. -- v. 17. Miscellanies; biographical and other sketches and letters. -- v. 18. Passages from the American note-books. -- v. 19-22. Notes of travel.

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Transportation Department, Office of University Research, Washington, D.C.

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Transportation Systems Center, Cambridge, Mass.

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Transportation Systems Center, Cambridge, Mass.

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Federal Highway Administration, Washington, D.C.

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Federal Highway Administration, Washington, D.C.