原文传递
FACTORS INFLUENCING THE TRANSFERABILITY OF MAINTENANCE STANDARDS FOR LOW-VOLUME ROADS.
| 题名： | FACTORS INFLUENCING THE TRANSFERABILITY OF MAINTENANCE STANDARDS FOR LOW-VOLUME ROADS. |
| 作者： | Liautaud-G; Faiz-A |
| 关键词： | LOW-VOLUME-ROADS; UNPAVED-HIGHWAYS; MAINTENANCE-STANDARDS; TRANSFERABILITY-; FACTOR-COSTS; MATERIAL-RESOURCES; ECONOMIC-ANALYSIS; CASE-STUDIES; AFRICA-; BRAZIL- |
| 摘要： | Among the many parameters that influence the selection of maintenance strategies for unpaved roads, two factors have been selected in this paper to illustrate that caution needs to be exercised when attempting to transfer policies or standards from one set of conditions to another. These two factors are "factor costs" (not budgets) and "material resources". Broadly speaking, the definition of a maintenance policy for an unpaved network implies that besides routine activities such as vegetation control and ditch and culvert cleaning, consideration should be given to the frequency of grading and also to the timing of graveling operations. Drawing from the experience collected in two widely different environments, one in the equatorial forest region of central Africa--where maintenance costs are high and gravel resources scarce--and the other in northeast Brazil, it is shown that maintenance standards are highly dependent not only on traffic volume but also on the properties of surfacing materials and the unit cost of grading. As shown and explained in this paper, the optimum grading frequency derived from economic analyses for a given volume of traffic may vary by a factor of 5, ranging between 2 and 10 times per year. Similarly, the threshold value of traffic volume at which surfacing an earth road with gravel becomes economically justified can range from below 20 to more that 100 vehicles per day, depending on cost of graveling and physical properties of the subgrade to be graveled. Such wide variations suggest the need for a careful definition of local conditions before an attempt is made to transfer maintenance standards across countries or even across regions within a country. |
| 总页数： | Transportation Research Record. 1994. (1434) pp73-76 (2 Fig., 2 Tab., 7 Ref.) |
| 报告类型： | 科技报告 |
相关文献
- International Conference on Low-Volume Roads, 2003 (8th). Held in Reno, Nevada on June 22-25, 2003. Planning and Administration; Energy and Environment; Design; Materials, Construction, and Maintenance; Operations and Safety. Transportation Research Record No. 1819, Volume 1.
- International Conference on Low-Volume Roads 2003, (8th). Held in Reno, Nevada on June 22-25, 2003. Planning and Administration; Energy and Environment; Design; Materials, Construction, and Maintenance; Operations and Safety. Transportation Research Record No. 1819, Volume 2.
- LOW-VOLUME ROAD GEOMETRIC DESIGN PRACTICES IN THE NATIONAL FORESTS OF THE UNITED STATES.
- Low-Volume Roads 2011, Volume 2. Transportation Research Record: Journal of the Transportation Research Board, No. 2204
- Investment Prioritization Methods for Low-Volume Roads. National Cooperative Highway Research Program (NCHRP) Synthesis 521. A Synthesis of Highway Practice.
- Low Volume Roads 2015: Volume 2. Transportation Research Record: Journal of the Transportation Research Board, No. 2473.
检索历史
应用推荐
