基于节点换装时间不确定的多任务集装箱运输方案优化

为提高集装箱多式联运组织运输的效率,在集装箱多式联运网络中,考虑不同运输方式在节点上换装时间的不确定性对集装箱多式联运选择运输方式和运输路径的影响,以总成本最小为目标建立带有时间和容量约束的整数规划模型,设计多蚁群并行算法,求得最佳的多任务集装箱运输方案。并根据运输任务数、运输规模的不同,设计多种类型算例,基于节点换装时间不确定性的情况,考虑任务优先级的选择策略,比较分析不同类型任务特征下各因素对最佳运输方案的影响,为集装箱多式联运决策提供理论参考。     

An evaluation of the transport to employment (T2E) scheme in Highland Scotland using social return on investment (SROI)

This paper presents findings from an evaluation of transport to employment (T2E) in rural Highland Scotland. T2E is a centrally co-ordinated shared transport service which provides access to workplace, training and childcare where no alternative transport is available. The paper assesses the social as well as economic impacts on the local community through social return on investment (SROI) analysis. Measurable social benefits were found to outweigh the investment by 3:1 suggesting the concept to be a viable solution in a climate where public transport options are limited and typically restricted by low density and dispersed populations and challenging conditions for delivery.     

Congestion analysis of waterborne, containerized imports from Asia to the United States

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.     

Out of Prague: a week-long intermodal shift from air to rail transport after Iceland’s Eyjafjallajökull erupted in 2010

In April 2010, the eruption of Eyjafjallajökull considerably disrupted air travel across Europe. The grounding of air transport forced passengers to cancel journeys or find alternative means of transport. We analyse short-term intermodal shifts as a reaction to sudden changes in air transport availability. The question addressed is whether, and in what capacity, air passengers used railways when Prague International Airport was closed. To compare the degree of intermodal shift in Prague for particular European destinations during the closure, we calculated an InterModal Shift Index. We concluded that approximately 20% of passengers travelling to neighbouring countries and 6% of passengers travelling to more distant European destinations chose rail as an alternative. Following the airport closure, travellers were willing to choose rail transport as an alternative, but this willingness varies for different countries and areas.     

The evolution of a regional container port system: the Pearl River Delta

This study investigates the progress of container port system development in South China, focusing particularly on the interplay between Hong Kong and the other ports in the Pearl River Delta (PRD) region. After identifying the downgrading trend of Hong Kong from a transshipment hub port for Asia and for China as a whole to a regional load center and the emergence of other deep-sea direct-service ports, the paper looks into the causes of this structural change of the port system. Four major causes are identified: the cost-base competition, the impact of the unique “one-country two-systems” policy, the impact of globalization and container standardization, and the impact of multi-modal accessibility and connectivity. The paper reveals that the interplay between different governments and between the governments and port operators are the local mechanisms that together as a whole respond to the shippers’ needs and the shipping lines’ pressure. It confirms that the interdependencies and competitive relations between terminals are being played out at a regional level. While the particular situation of the PRD is unique in many regards, the features emerging there, with its dominant hub, its network of feeder ports and its emerging direct-service non-hub terminals, are being replicated elsewhere.     

How persuasive is ‘free’ public transport?: A survey among commuters in the Brussels Capital Region

In Belgium, several cities have been experimenting with ‘free’ public transport based on the concept of a third payer system. This study explores the modal shift potential of this measure for commuters by means of a large-scale survey. The results indicate that there is still a margin for a further modal shift, but in order to make public transport more attractive to car users, the price paid by the commuter should be lowered, the quality and capacity of the public services should be improved and the mobility policy of the companies should be adjusted in favour of public transport.     

铁路城际客运系统建设融资考察与建议

通过对法国、德国、日本高速铁路建设情况的考察,了解国外高速铁路建设的投融资经验、规律与趋势,分析高速铁路建设适用的金融产品,针对融资中的主要问题,借鉴国外企业的主要咨询意见,提出我国高速铁路投融资方案建议。     

Where to park? A behavioural comparison of bus Park and Ride and city centre car park usage in Bath,UK

Integrating car parking facilities with public transport in Park and Ride (P&R) facilities has the potential to shorten car trips, contributing to more sustainable mobility. There is an ongoing debate about the actual effects of P&R on the transport system at the subregional level. A key issue is the relative attractiveness of city centre car parks (CCCP), P&R and public transport. The paper presents the findings of a comparative empirical case-study based on a field survey of CCCP and P&R users conducted in the city of Bath, UK. Spatial and statistical analyses are applied. Radial distance to parking, availability of P&R sites in the direction of travel, gender, age, income and party-size are found to be important factors in a binary logistic regression model, explaining the revealed-preference of parking type. Stated analysis of foregone parking alternatives suggests more use of public transport and walking/cycling would likely occur without first-best parking alternatives. The policy implications and possible planning alternatives to P&R at the urban fringes for achieving greater sustainability goals are also discussed.     

Transport mode choice in South East Asia: Investigating the relationship between transport users’ perception and travel behaviour in Johor Bahru,Malaysia

The worldwide increase in private car dependency poses a set of significant environmental, economic and social sustainability challenges that continue to undermine the urban quality of life. Rapid motorisation, particularly in South East Asia (SEA), has emerged as a global concern given the region’s cumulative population, rate of industrialisation, and large-scale urbanisation. Thus, there is a compelling need to enhance our understanding of the underlying dynamics of how people perceive and use transportation such that transport planning is better placed to address the current, unsustainable travel patterns in SEA. Despite this need, there has been relatively limited SEA-based research that has endeavoured to examine travel perceptions and transport mode choice from a non-instrumental perspective. This research redresses this deficit by investigating the relationship between transport users’ perceptions and travel behaviours within SEA, with a particular focus on psychosocial drivers of transport mode choice interfaced with more traditional instrumental measures.Spatially stratified survey data have been collected in a case study area, Johor Bahru, Malaysia, comprising users from different transport user groups. Employing regression modelling, drivers of individual’s travel behaviour are examined. Results highlight the merit in recognising the role of non-instrumental motives alongside instrumental motives to explain transport mode choice. We conclude by highlighting that transport mode choices are motivated by a range of locational, socio-demographic, psychological and cultural determinants. The current research has contributed to a better understanding of transport mode choice in Johor Bahru and provides a foundation for future SEA-based travel behaviour research. Studies in this area can inform more sustainable travel behaviour in the SEA region.     

Integration of HSR and air transport: Understanding passengers’ preferences

Different solutions for the integration of high-speed rail (HSR) and air transport could be implemented, ranging from very basic integration to more sophisticated systems which include ticket and handling integration. A discrete choice experiment is conducted to better understand passengers’ preferences. We estimate a number of flexible choice models, taking into account the existence of systematic and random taste heterogeneity. We obtain a range of willingness-to-pay values for service quality attributes, finding some important results that can be used to infer policy conclusions about the real attractiveness of the Air–HSR integrated alternative. In this respect, we find that schedule coordination which reduces connecting time will be crucial.