1. 01/01/1986 Roads vary from trails to major hard-surface highways. Depending on the local climate and materials available for construction, roads may sometimes be open to traffic for only part of the year. A year-round road is often more expensive to build, and may not always be necessary. As a general rule,...
  2. 01/01/1987 Suolo commovente per irrigazione e strada-costruire č importante all'agricoltura buon. Accurato preparazione di terra per irrigazione ed uso di acqua buono salva acqua, lavori, e sporchi, e migliora prodotti di raccolto. Strade migliorate fanno comunicazione piů facile fra coltivatori, i loro...
  3. 01/01/1990 This book serves as a brief introduction to labour-based road construction. It is aimed at supervisory staff and presents the broad technical, organisational and managerial principles of labour-based road construction works. 43 double-sided pages, illustrated Prepared for the International Labour...
  4. 01/01/1996 The text covers two basic designs of eath road called, for convenience 'village' and 'market' roads; definitions based on levels of usage, from a few vehicles per day or week (village), to perhaps 50 vehicles per day (market). The text describes the drainage principles and techniques; route...