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1.
In the United States, the goal of essential air service (EAS) is to provide a minimum level of air transport service from smaller, often remote communities to the national network. While supporters of EAS tout the economic benefits of connecting rural and isolated communities, critics cite high costs, low use and antiquated eligibility requirements as factors which compromise the value of the program. In this paper, a comprehensive database of US airports is combined with network analysis techniques and a geographic information system to evaluate population access (at the census tract level) to EAS airports for 2006. Results suggest that redundant coverage of EAS market areas by alternative Federal Aviation Administration designated hub airports can contribute to EAS airport market leakage and that alternative definitions of EAS community eligibility have the potential to dramatically increase programmatic efficiency and reduce federal monies spent on EAS subsidies.  相似文献   

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This paper quantifies the changes in accessibility at small area scale arising from the combined effects of dramatic air traffic declines and a greatly expanded motorway network in Ireland during the period of the great recession. The subsequent policy decisions by government are assessed in light of the intermodal accessibility changes identified. The Irish Government engaged in an extensive motorway construction programme throughout the 2000s, greatly increasing the overall length of the inter-urban motorway network. The essential air transport services programme put in place in the 1990s to guarantee a minimum level of air access to disadvantaged regions was significantly reduced at the end of the 2008–2011 period, with only two of the six regional airports continuing to have any form of subsidised public service obligation for the period 2011–2014. In this study, small area datasets are used to measure the net impact of these changes on air transport accessibility in Ireland and the potential spatial inequalities that arise as a result of these changes. An inter-modal accessibility approach is used where the physical characteristics of the road transport network to airports and the network structure characteristics of the air transport system are taken into account to evaluate the levels of air transport accessibility at the small-area district level. Results from the analysis show that the improved surface access to the larger Irish airports (Dublin and Belfast) has enhanced the range of European and global locations directly accessible by air for many communities in Ireland. The net effect of these changes has been to concentrate air traffic at the largest Irish airports.  相似文献   

4.
To ensure more effective integration of development and transport planning, new national planning policy guidance in the UK requires greater consideration of accessibility issues. Although quantitative accessibility analysis is common in research, the practical application of these techniques in land use planning has been rare, and assessment has been restricted to qualitative considerations. The strong policy focus on accessibility increases the need for robustness, but practical quantitative techniques are still evolving. This paper describes a structured approach to accessibility analysis, as part of the development of a new structure plan for Edinburgh and the Lothians, and demonstrates how an ‘integration index’ can be developed from accessibility measures to help compare alternative approaches.  相似文献   

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This paper looks at the probability of loss of commuter air service in the United States. Logistic regression using a model consisting of geographic, economic, and social variables is constructed to examine those communities in the United States that are in danger of losing commercial air service. After modeling the loss of service, patterns are discovered as to the location of these communities. The paper concludes with analysis of those cities targeted for loss of service and solutions for what these communities can do to continue to be part of the commercial air system.  相似文献   

6.
This paper evaluates the accessibility impact of the future Madrid–Barcelona–French border high-speed line. Accessibility impact of the new infrastructure is measured by means of three indicators: weighted average travel times, economic potential and daily accessibility. These indicators respond to different conceptualizations and offer complementary information about the issue accessibility. The results are quite different: very concentrated effects in the daily accessibility indicator, less concentrated in the economic potential one and more dispersal in the location indicator. The sign (polarizing/balancing) of these effects depend on the geographic scale: polarizing effects at the national level and balancing effects at both corridor and European levels are identified. A geographic information system (GIS) was used to carry out this study.  相似文献   

7.
The magnitude 7.0 earthquake that struck Haiti in January 2010 led to an unprecedented effort in collecting and providing geographical information in support of humanitarian aid. Although most of the compiled datasets and generated maps were able to provide specific and detailed information regarding the location of damaged buildings and road interruptions, none or little information was available to describe the accessibility—or otherwise—of the urban space. Here we try to offer an alternative method to define the urban accessibility landscape in the aftermath of earthquake damage, by combining simple graph theory concepts and GIS-based spatial analysis to assess how the urban space accessibility decreases when the road network is damaged.  相似文献   

8.
In many Latin American cities, rapid motorization and population growth have resulted in unprecedented urban transportation challenges, with lower income populations disproportionately facing constraints to mobility as well as externalities like air pollution, traffic collisions, and the impacts of climate change. The construction of bicycle lane networks has been identified as an effective tool for increasing citizen's mobility and accessibility as well as combating the effects of motorization, but in cities where bicycle lane networks exist, it is not known if they have benefited different income groups equally. This paper assesses the extent to which bicycle lane provisioning has been equitable among neighborhoods in Rio de Janeiro and Curitiba. Both cities were found to have more than twice the supply of bicycle lanes in the wealthiest quintile than the lowest income quintile relative to area and population. A network analysis using a Level of Traffic Stress classification to categorize roads found that wealthier areas have more commercial areas accessible along safer cycling routes. Implications for cycling policy and future research are discussed.  相似文献   

9.
This study examines the short- and long-run effects of various determinants on the demand for US air passenger-services using the Johansen cointegration analysis and a vector error-correction (VEC) model. Results show that, in the long-run, airfare, disposable income and NASDAQ have significant effects on US air travel demand. The combined short-run dynamic effects of disposable income, NASDAQ, population and airfare jointly explain changes in air passenger-miles. Finally, we find that the 9/11 terrorist attacks drop air passenger demand by 5% during 2001:Q3-2002:Q2, which in turn pushes down the seat capacity by 4%. However, it has little impact on airfare.  相似文献   

10.
This paper develops a methodology for calculating the European value added value (EVA) generated by transport infrastructure projects. This approach is particularly useful for evaluating projects in the framework of Trans-European Transport Networks (TEN-T), although it may also be used in trans-national projects in other geographical areas. The methodology is based on the appraisal of spatial spillovers generated by trans-national projects by using accessibility indicators (access to markets) and Geographical Information Systems (GIS). Projects are split into sections and spillover effects of each section are then computed. The sections that produce a high proportion of spillovers in relation to internal benefits generate a high EVA. Additionally, indicators are obtained of the effects of each section in terms of spatial concentration on the different countries affected, efficiency (general improvement in accessibility) and territorial cohesion (reduction in accessibility disparities between regions). The validity of this approach is verified by applying it to TEN-T priority project 25. This methodology does not seek to replace existing project appraisal methodologies (particularly the cost-benefit analysis); rather it provides complementary data for decision-making. Sections which are scarcely profitable from the cost-benefit analysis perspective but which have high European value added should receive more European funding than more profitable sections of markedly national interest.  相似文献   

11.
One of the most high profile migration movements to the UK in recent years has undoubtedly been that of A8, and mainly Polish, newcomers following the 2004 expansion of the EU. Accompanying, and perhaps fuelling, this increase in mobility has been a substantial rise in low cost air travel provision. The UK Civil Aviation Authority and the Civil Aviation Office of the Republic of Poland statistics testify to the expansion in passenger numbers between Poland and the UK since 2004, with Ryanair being one of the main carriers. Although other modes of transport, such as coach and car travel, are still important, in some senses these Ryanair flights define this new migration. Taking as a starting point that airports and airplanes are social and cultural venues in their own right, and that migration journeys are themselves at the heart of the migration experience, this article uses interviews with Polish migrants in the UK to consider this low cost air travel for migration in more depth. Firstly it briefly charts the increase in air travel between Poland and the UK, considering the narratives of mobility cultures collected with the migrants. Secondly it investigates the collective dimension of travelling for migration on these flights and the tensions which emerge around this collectivity. Finally, it reflects on the wider costs and contexts of low cost shuttle flights as a late capitalist mode of migration transport.  相似文献   

12.
Everyday traffic accounts for a significant share of overall greenhouse gas emissions, in particular carbon dioxide (CO2). While several solutions have been proposed for decreasing the emissions, a new kind of land use planning is required in order to achieve long-term effects. This study focuses on the effect of large retail store locations in the urban structure on overall CO2 emissions, by using the Oulu region, Finland, as a case study. The aim was to utilize GIS tools to assess store locations in terms of CO2 emissions from private cars used for consumer traffic. In this case, not only are the locations of the existing and planned retail units investigated with respect to population distribution and car ownership, but the analysis is also carried out by regarding any location within the study area as a hypothetical site for a large retail unit. According to the applied method, CO2 values are lowest near the centre of the studied region, the region with the highest population density, although the city centre itself did not turn out to be the most optimal location for a retail store in terms of CO2 emissions. Nevertheless, by generally reducing trip length, a compact urban structure is an important way of achieving long-term cuts in CO2 emissions.  相似文献   

13.
This paper examines the student experience of transport, within the context of two hitherto distinct discourses. Firstly, the transport and social exclusion discourse, which highlights the role that low mobility plays in the experience of exclusion. Secondly, the widening participation discourse, which emphasises inequitable access to and achievement in higher education (HE) by non-traditional students as a component of social exclusion. The paper reports the results of a series of focus groups, undertaken with current HE students from a diverse range of backgrounds, many of whom may be considered to be non-traditional students. Results suggest that inadequate access to transport is a substantial barrier to access and achievement in HE, for these students. This highlights the influence of transport upon the successful implementation of social policy. Without consideration of transport and the physical accessibility of HE, the aim of increasing and widening participation in HE is unlikely to be realised.  相似文献   

14.
A queuing model is introduced for estimating container flow times through port terminals as a function of infrastructure, staffing, and import volume. The model is statistically calibrated on industry data. Flow-time estimates of the model are aggregated with estimates from models previously developed for rail networks to develop estimates of the total container flow times from West Coast ports to inland distribution centers. Integrated with a supply-chain optimization model, the queuing formulas are used to predict import flows by port and landside channel in scenarios of total import growth, varying all-water rates, and a higher import share for nation-wide importers.  相似文献   

15.
This article presents a procedure for establishing and ranking the areas that are candidates for building truck cargo terminals, based on the analytic hierarchy process (AHP) and considering location factors, with focus on accessibility considerations, expressed by indicators derived from graph theory. Accessibility is thus defined objectively for each area, contemplating its needs regarding production or consumption of cargo or promotion of intermodal transport of products. The proposed approach determines the most suitable area for locating the terminal according to the perception of each actor participating in the process as well as the set of actors, seeking to conjugate conflicting interests and facilitate convergence and the establishment of negotiated solutions. With this, it provides a more transparent and participative decision-making process and supplies basic elements for government bodies to formulate their socioeconomic development policies. The application of this procedure in the greater Rio de Janeiro metropolitan region demonstrated its feasibility in developing countries and in contexts with restricted data, funding and planning.  相似文献   

16.
This paper deals with the implications of the 1998 UK transport White Paper for regional airports and air services within the wider context of the promotion of an integrated and sustainable transport system. More specifically, the discussion initially addresses the political and business context of the development of air transport in the UK regions. Secondly, the recent trends defining that development are isolated, particular attention being paid to the increasing importance of supplier-led strategies in air transport and the segmented markets served by regional airports. Finally, the three, not easily reconciled, strands, which can be identified in the White Paper’s analysis of aviation are considered. These are: air transport's relationship with sustainable development; the integration of air transport with surface modes; and the contribution of air transport to regional economic growth.  相似文献   

17.
This paper extends research on urban form and travel behavior beyond adult travel by examining teen travelers aged 13–19 in the Greater Toronto Area. Data from the Transportation Tomorrow Survey (TTS) survey are used to study four main research questions: (1) How has teen mode choice changed from 1986 to 2006? (2) How do these choices vary as teens transition from the 13–15 age group to being of driving age (16–19)? (3) How do these choices vary across the different urban and suburban regions of the GTA? (4) What are some of the differences between teen travel and adult travel? Results show that in general, active transportation has decreased, while auto-passenger mode shares have increased across the region. The younger group walks more and the older group takes transit more for both school and discretionary travel. Jurisdictions with better transit supply and orientation have higher transit mode shares for school trips, but discretionary trips have very low transit mode shares. Walk mode shares for both school and discretionary travel are similar across all jurisdictions, regardless of whether they are urban or suburban. In contrast to adult travel in the GTA, built form characteristics and transit supply do not appear to have a direct relationship with teen mode choice. Urban form appears to exert an indirect influence on teen travel.  相似文献   

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A travel plan is a package of measures implemented by an organisation to encourage people who travel to/from that organisation to do so by means other than driving alone by private car. This paper advances two principal arguments: firstly, that the planning system and maximum parking standards as part of it are the main factors leading to travel plan development in England today; and, secondly, that the difficulties of using the planning system in this way means that there is a risk that many of these travel plans are unlikely to have a great deal of influence on travel patterns, making it more unlikely that they will achieve the predicted impact on travel behaviour change, as contained in the important study and report “Smarter Choices” (Department for Transport, 2004).This paper presents results from a survey of planning and transport authorities in England, which obtained a 62% response rate from the 139 authorities contacted. It also uses the results of 18 interviews with local authority and Highways Agency staff involved in securing travel plans through the planning process. The survey found that the planning process (as opposed to voluntary efforts) is indeed the main means by which travel plans are now secured. In addition, maximum parking standards were shown to have a major influence on travel plan formation for organisations going through the planning process. There are however reasons to doubt that all of the travel plans secured through the planning process are effective. This is because:
Many local authorities use only planning conditions and not the more flexible (but complex) obligations which would allow more complex travel plans to be secured.
There is a lack of monitoring of travel plans in many authorities.
There is evidence that in many authority areas there are travel plans in breach of legal agreements, but these breaches are not enforced, reportedly due to a lack of monitoring, resources, and other organisational issues.
The paper discusses the reasons for these findings and also makes a number of suggestions as to how the planning system could be improved as a means of securing travel plans.  相似文献   

20.
On 5 February 1999, His Excellency Li Zhaoxing, Chinese Ambassador to the United States, took part in an international forum at Florida Gulf Coast University, FortMyers, Florida. The purpose of the forum was to explore the opportunities and challenges facing business and government as we grow ever closer to a true global economy. This excerpt from the event focuses on the expanding relationship between the People's Republic of China and the United States, particularly as it relates to travel, tourism, and the current economic state of the People's Republic of China, and includes a discussion of the impact of technology on global relationships. Participants on the panel included Dr Howard Chan, formerly of Tsinghua University, Beijing; Mr Larry Simms of Gibson, Dunn & Crutcher; Dr Richard Pegnetter, Dean of FGCU College of Business; Mr Henry Clements, Jr, president of Clements Citrus Sales, Inc.; and Mr Mark Teagan of Enterprise Florida.  相似文献   

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