Fuel consumption analysis of driven trips with respect to route choice

Advances in technology equip traffic domain with instruments to gather and analyse data for safe and fuel-efficient traveling. In this article, we elaborate on the effects that taxi drivers' route selection has on fuel efficiency. For this purpose, we fuse real driving behaviour data from taxi cabs, weather, digital map, and traffic situation information to gain understanding of how the routes are selected and what are the effects in terms of fuel-efficiency. Analysis of actually driven trips and their quickest and shortest counterparts is conducted to find out the fuel-efficiency consequences on route selection. The judgments are used for developing a fuel-consumption model, exploring further the route characteristics and external factors affecting fuel consumption.Peer reviewe

Carbon Free Boston: Transportation Technical Report

Part of a series of reports that includes: Carbon Free Boston: Summary Report; Carbon Free Boston: Social Equity Report; Carbon Free Boston: Technical Summary; Carbon Free Boston: Buildings Technical Report; Carbon Free Boston: Waste Technical Report; Carbon Free Boston: Energy Technical Report; Carbon Free Boston: Offsets Technical ReportOVERVIEW: Transportation connects Boston’s workers, residents and tourists to their livelihoods, health care, education, recreation, culture, and other aspects of life quality. In cities, transit access is a critical factor determining upward mobility. Yet many urban transportation systems, including Boston’s, underserve some populations along one or more of those dimensions. Boston has the opportunity and means to expand mobility access to all residents, and at the same time reduce GHG emissions from transportation. This requires the transformation of the automobile-centric system that is fueled predominantly by gasoline and diesel fuel. The near elimination of fossil fuels—combined with more transit, walking, and biking—will curtail air pollution and crashes, and dramatically reduce the public health impact of transportation. The City embarks on this transition from a position of strength. Boston is consistently ranked as one of the most walkable and bikeable cities in the nation, and one in three commuters already take public transportation. There are three general strategies to reaching a carbon-neutral transportation system: • Shift trips out of automobiles to transit, biking, and walking;1 • Reduce automobile trips via land use planning that encourages denser development and affordable housing in transit-rich neighborhoods; • Shift most automobiles, trucks, buses, and trains to zero-GHG electricity. Even with Boston’s strong transit foundation, a carbon-neutral transportation system requires a wholesale change in Boston’s transportation culture. Success depends on the intelligent adoption of new technologies, influencing behavior with strong, equitable, and clearly articulated planning and investment, and effective collaboration with state and regional partners.Published versio

The impact of urban spatial structure on travel demand in the United States

The authors combine measures of urban form and public transit supply for 114 urbanized areas with the 1990 Nationwide Personal Transportation Survey to address two questions: (1) How do measures of urban form, including city shape, road density, the spatial distribution of population, and jobs-housing balance affect the annual miles driven and commute mode choices of U.S. households? (2) How does the supply of public transportation (annual route miles supplied and availability of transit stops) affect miles driven and commute mode choice? The authors find that jobs-housing balance, population centrality, and rail miles supplied significantly reduce the probability of driving to work in cities with some rail transit. Population centrality and jobs-housing balance have a significant impact on annual household vehicle miles traveled (VMT), as do city shape, road density, and (in rail cities) annual rail route miles supplied. The elasticity of VMT with respect to each variable is small, on the order of 0.10-0.20 in absolute value. However, changing several measures of form simultaneously can reduce annual VMT significantly. Moving the sample households from a city with the characteristics of Atlanta to a city with the characteristics of Boston reduces annual VMT by 25 percent.Housing&Human Habitats,Roads&Highways,Environmental Economics&Policies,Economic Theory&Research,Transport Economics Policy&Planning,Economic Theory&Research,Roads&Highways,Transport Economics Policy&Planning,Geographical Information Systems,Housing&Human Habitats

Proposal of a dynamic performance index to analyze driving pattern effect on car emissions

The contributions of driver behaviour as well as surrounding infrastructure are decisive on pollutant emissions from vehicles in real traffic situations. This article deals with the preliminary study of the interaction between the dynamic variables recorded in a vehicle (driving pattern) and pollutant emissions produced over a given urban route. It has been established a “dynamic performance index”-DPI, which is calculated from some driving pattern parameters, which in turn depends on traffic congestion level and route characteristics, in order to determine whether the driving has been aggressive, normal or calm. Two passenger cars instrumented with a portable activity measurement system -to record dynamic variables- and on-board emission measurement equipment have been used. This study has shown that smooth driving patterns can reduce up to 80% NOX emissions and up to 20% of fuel in the same rout

Segmentation of the Travel Market in London: Estimates of Elasticities and Values of Travel Time.

This paper reports background research carried out for an ESRC funded research project entitled "Assessing the Benefits and Incidence of Road Pricing in London". The first two stages of this work are reported here. The first stage was to segment the market for car use in Central and Inner London according to the salient characteristics of users. The second stage was to make estimates of the range of probable values of time and elasticities for each segment of the market using secondary data. A thorough literature search was undertaken and we have liaised with other relevant work in progress. The results of our distillation of what we have found/borrowed are given in section 3. Own price elasticities of demand are presented disaggregated by mode and journey purpose. In the case of car, latest evidence emerging from the DoT study of road pricing in London has been included, showing how elasticities might be expected to rise as the toll is increased radically such as to have severe `income effects'. Values of Time are presented disaggregated by mode, journey purpose and household income group. There is a difficulty, however, in using these values in mode choice transport models and this is discussed in Section 4. Section 5 presents conclusions and discusses application of the results of this paper in the ESRC project. Section 6 lists references and Section 7 is an Appendix containing brief highlights from many of the source articles consulted in our literature review

Towards a more appropriate method for determining the optimal scale of production units

In this paper the overall diseconomies experienced beyond certain production unit scale thresholds are investigated. These are due to several costs, including those relating to the consumption of non- renewable resources, which firms have generally not internalised, to the extent that they can operate far beyond the socially optimal scale. Economic instruments such as environmental taxes may induce a shift towards marginally more sustainable production levels for a plant of a given size, but they are not designed to affect the plant size itself. This paper suggests a method for determining a socially optimal scale, by focussing on the factors which determine optimality. The results of applying this method show that establishing the scale of production units at a social optimum rather than a private one implies a significant decrease in scale for most economic activities. Downscaling has significant economic welfare and environmental advantages. Incentives linked to the factors which determine the social optimum are put forward as measures for inducing a shift towards an optimal size for production units.optimal scale, sustainable production, market areas

The choice between road transport and rolling motorway: a case study

The paper reports on a research project aimed at estimating the potential demand for a rolling motorway service connecting Trieste (Italy) and Chop (Ukraine). More specifically, the study has explored which factors play a role in the choice between the current prevailing mode of transport, that is road transport by trucks, and a rolling motorway service. Based on the estimates derived from a discrete choice model obtained on the basis of stated choice data collected from truck drivers and from transport companies, it is found that the monetary cost, the travel time and the day of the week play an important role. The scenario analysis allows us to conclude that under the current prices and regulations a rolling motorway service operating on a weekday would have no potential demand, whereas some potential demand would have a service operating during the weekend. Substantial demand for a rolling motorway service appears only if the monetary road cost (fuel cost or highway toll) increases considerably. A heavy-vehicle road tax equivalent to the one used for crossing the Alps in Switzerland and Austria would alter the balance in favor of the rolling motorway.Rail transport, modal choice, road transport, rolling motorway.

Taxes And Transport Externalities

The paper reviews the role of taxation in controlling transport externalities. It argues that the design of transport taxes should take into account pre-existing tax distortions in the economy and looks at the implications of restrictions on the transport instruments at the disposal of the policy maker. The relevance of equity considerations for transport pricing is also explored.transport economics; externalities; externality tax; equity; efficiency