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- W629675197 abstract "This paper examines the continuing evolution of Canada’s geometric design practices across the country in the decade since the publication of the last major revision of the national Geometric Design Guide for Canadian Roads by the Transportation Association of Canada in 1999. Since that time a number of incremental revisions to the guide have been released that recognize the improved state of knowledge in areas such as: the selection of design speed; horizontal and vertical alignment design consistency; modern roundabout design; intersection sight distance guidance; cost-effectiveness warrants for roadside barrier; and a number of other issues. At the start of their paper, the authors outline both the changes noted above, and the broader evolution of Canadian geometric design practice that has taken place in the last ten years. They also highlight a set of key vectors for change that continue to evolve and note that that the need to manage these and other shifts in practice has become more challenging as the field continues to evolve rapidly in response to a number of critical pressures. These pressures include: the continuing emergence of new knowledge from research; public pressures for more sustainable and community-oriented design practices in constrained and sensitive situations; a growing recognition of the need to strengthen human factors guidance with the geometric design practice framework; and the continuing need to develop road designs that are both cost-effective and efficient. The second section of the paper highlights the impacts of these emerging issues through a discussion of the practical design responses of various Canadian jurisdictions to them. These responses are reviewed through a series of examples from across the country that both illustrate and underline the importance of these pressures, and the needs they generate for new design policies and approaches that respond to them. Critical gaps in knowledge and design policies are identified. In the final part of this paper the authors discuss a new Canadian initiative that has the potential to initiate major changes to Canada’s national Geometric Design Guide. This initiative is framed in the recognition of the critical change vectors identified in the discussion at the beginning of this paper. The importance of knowledge sharing, and its potential for nourishing this revision initiative, are discussed." @default.
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- W629675197 date "2010-01-01" @default.
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- W629675197 title "Country Report: Canada. Pressures for Change: New Developments and Emerging Issues in Canadian Geometric Design" @default.
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