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Documents critical site specific variables that influence transit agencies' spare bus ratio policies. It profiles a select group of transit agencies of varying sizes and geographic locations and describes their operating environments in order to relate how these affect the number of spare buses each agency needs to meet its service requirements.
Addresses the system-specific variables that directly impact fleet size, and the spare ratios that are maintained by individual transit agencies. From the information obtained, it appears that most rail transit agencies closely monitor the spare vehicles they maintain to maximize efficiency and thereby reduce operating costs. This report of the Transportation Research Board describes operating environments at 21 selected rail transit agencies of various sizes in key geographical locations in North America. It contains survey information about operating practices, impediments, and strategies used to appropriately size fleets within each agency's operating context.
"This reports documents successful practices in the United States and Canada, and presents information on efforts employed to achieve optimal bus fleet size and effective spare bus ratios. The objective is to update the findings of TCRP Synthesis 11: System-Specific Spare Bus Ratios, as significant changes have occurred in the transit industry since 1995."--Preface.