REHABILITATION AND UPGRADING DESIGN OF EARTH AND GRAVEL ROADS IN TROPICAL DEVELOPING COUNTRIES

The earth road construction standard that is required for a given traffic volume appears to be a function of the terrain morphology and type of soil. Instead of a formal application of a priori concepts, site investigation of natural conditions and road performance should be a sound basis for design of good-quality and cost-effective rehabilitation and upgrading of earth and gravel roads. An appropriate design methodology based on comprehensive field investigations was developed for road rehabilitation schemes in Madagascar and tested in contract works in that country, and also in Zaire. The methodology proved to save money and time, and rather than resulting in poor design, capturing conditions and resolving design problems in the field may improve the design quality. The methodology comprises three phases. The first phase is the comprehensive inventory and detailed condition survey, the second phase is field design, and the third phase is complementary office design and estimation of quantities. The accuracy of quantity estimates derived from this simplified design methodology appears to be satisfactory for contract rehabilitation works.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1991/1291vol1/1291-024.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=REHABILITATION+AND+UPGRADING+DESIGN+OF+EARTH+AND+GRAVEL+ROADS+IN+TROPICAL+DEVELOPING+COUNTRIES&author=J.+de+O+S+Horta&publication_year=1991
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  • Find a library where document is available. Order URL: http://worldcat.org/isbn/030905715
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1291, Fifth International Conference on Low-Volume Roads, May 19-23, 1991, Raleigh, North Carolina, Volume 1. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • de O S Horta, Jose Carlos
• Conference:
  • International Conference on Low-Volume Roads, 5th, 1991, Raleigh, North Carolina, USA
• Publication Date: 1991

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 215-223
• Monograph Title: Fifth International Conference on Low-Volume Roads May 19-23 1991, Raleigh, North Carolina, USA; volumes 1 and 2
• Serial:
  • Transportation Research Record
  • Issue Number: 1291
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accuracy; Condition surveys; Conferences; Contract administration; Developing countries; Driver rehabilitation; Earth roads; Estimates; Field studies; Gravel roads; Highway design; Inventory; Low volume roads; Modernization; Tropics
• Uncontrolled Terms: Quantities; Rehabilitation; Site investigation
• Geographic Terms: Congo (Democratic Republic); Madagascar
• Old TRIS Terms: Contract maintenance; Field investigations
• Subject Areas: Administration and Management; Design; Freight Transportation; Highways; Maintenance and Preservation; Pavements; I10: Economics and Administration; I22: Design of Pavements, Railways and Guideways; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00611762
• Record Type: Publication
• ISBN: 030905715
• Files: TRIS, TRB, ATRI
• Created Date: Aug 31 1991 12:00AM