11 resultados para road-rail level crossings

em WestminsterResearch - UK


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Several approaches can be used to analyse performance, energy consumption and CO2 emissions in freight transport. In this paper we define and apply a vehicle-oriented, bottom up survey approach, the so called ‘vehicle approach’, in contrast to a ‘supply chain approach’. The main objective of the approach is to assess the impacts of various freight transport operations on efficiency and energy use. We apply the approach, comparing official statistics on freight transport and energy efficiency in Britain and France. Results on freight intensity, vehicle utilisation, fuel use, fuel efficiency and CO2 intensity are compared for the two countries. The results indicate comparable levels of operational and fuel efficiency in road freight transport operations in the two countries. Issues that can be addressed with the vehicle approach include: the impacts of technology innovations and logistics decisions implemented in freight companies, and the quantification of the effect of policy measures on fuel use at the national level.

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The objective of our research was to analyse the relevant logistic factors influencing energy efficiency in road freight transport, while quantifying the potential for CO2 reduction. We carried out a survey and linked fuel consumption to transport performance parameters in 50 German haulage companies during 2003. Efficiency ranges from 0.8 tkm to 26 tkm for 1 kg CO2 emissions. The results show a high potential for improvements, given a low level of efficiency in vehicle usage and load factor, scarce use of lightweight vehicle design, incorrectly selected vehicle class and a high proportion of empty runs. Efficiency measures are poorly applied.

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This report builds on a conceptual framework developed by McKinnon (2007) for analysing the performance and impacts of freight transport. This framework is used to analyse the performance of road freight transport by heavy goods vehicles (HGVs) in Britain over the period from 1984 to 2007 using data from the Continuing Survey of Road Goods Transport. The efficiency and intensity of HGV operations are assessed. The determinants that have led to the changes in HGV key variables (including length of haul, vehicle carrying capacity, lading factor, empty running) are considered. A forecast of the future level of HGV activity (in terms of vehicle kilometres travelled, fuel consumed and CO2 emissions) in 2020 is presented.

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This paper examines the development of road freight transport operations to, from, and within London, from medieval times to the present. Until the twentieth century, road transport was the dominant mode within London but was less important for goods moved between the rest of the country and the capital. However, since the mid-twentieth century, road transport has also dominated goods movements to and from London, mainly through technological developments in goods vehicle speed and size. Since the introduction of a Mayor of London in 2000, there has been much interest in the efficiency and sustainability of road freight transport measures at a London level. Analysis suggests that present day journeys from London generate approximately four times fewer vehicle miles per tonne lifted than in the 1830s and nine times fewer than in the 1690s.