摘要: |
This study developed a methodology for improving the practice of making transit asset investment decisions at state departments of transportation and local transit agencies. The results of a literature review indicated that the majority of studies find there are significant differences in vehicle operating costs between road types (i.e., bituminous versus gravel versus earth), age, mileage, and vehicle type. Vehicle repair/maintenance cost is found to be primarily affected by vehicle condition. In terms of non-vehicle operating costs, vehicle downtime due to maintenance work and road calls due to vehicle breakdowns on the road were extensively studied in relation to vehicle condition. The major capability of the new vehicle deterioration model developed under this study is to predict the future condition of the vehicle based on the historical records of the selected dependent factors, such as vehicles age, mileage, and current conditions. / NOTE: Rept. for Jun 00-Oct 01. / Supplementary Notes: Sponsored by Department of Transportation, Washington, DC. Research and Special Programs Administration. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |