System-Specific Spare Bus Ratios

TRB’s Transit Cooperative Research Program (TCRP) Synthesis 11: System-Specific Spare Bus Ratios 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.

In April 2014, TRB released TCRP Synthesis 109: System-Specific Spare Bus Ratios Update, as an update to TCRP Synthesis 11.