Research has shown that there are very large differences in the availability and costs of transport between Africa and Asia. Africa is at a considerable disadvantage in all respects. Development funds to date have been almost exclusively used for infrastructure, yet there is huge potential for cost savings from an improvement in vehicle efficiency. The provision of transport services has been left to the market, but the market has not been working effectively. High transport costs and unreliable service provision have a significant impact on industry and on the mobility of people. The results of research carried out on urban transport services in Uganda are described. To understand the transport market and its operations, bus surveys and interviews were carried out with the main stakeholders in the capital city and two rural towns. The major problems faced by transport operators are identified, and their impact on vehicle operating costs is analyzed. Also examined are transport regulations and the current organization of transport services and their impact on vehicle utilization. The key areas highlighted for concern include anticompetitive practices by the associations that control service provision and absence of transport planning and regulation. Finally, recommendations to improve vehicle operations are made. These range from long-term policy and institutional reforms (including legislative changes, vehicle import regulation, and setting up of a transport regulator body and private-public partnership arrangements) to shorter-term initiatives addressing issues such as vehicle financing, driver training, and safety.
The Bermondsey Dive-Under (BDU) scheme is a fundamental part of UK's Thameslink Programme. The scheme involves extensive demolition of 900 m of masonry viaduct followed by the construction of 900 m of new structures, 200 m of reinforced-earth structures and 200 m of embankment modifications. Crushed brick is typically not used as a structural fill material in the UK due to concerns over its friability and associated long-term performance. This paper describes a study undertaken in 2012 that examined the viability of recycling the demolished brickwork material into a crushed engineered fill material for use in the BDU permanent works. The overarching objective of the study was to seek to reduce the scheme's significant volumes of both imported fill and exported demolition material, with associated sustainability advantages in addition to the environmental and safety benefits resulting from the significantly reduced lorry movements from London's streets. The paper details the sampling and testing of brickwork that was undertaken and presents the findings from the study. The paper also discusses some of the issues associated with introducing innovation within major work programmes. The BDU scheme is currently under construction and is scheduled for completion in 2017.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.