A spare ratio or spares ratio is the percentage of unused vehicles operated by a public transport operator during peak service periods. It is calculated as a simple percentage of the total fleet size. [1]
In the United States, the Federal Transit Administration (FTA) sets a 20 percent guideline for the spare ratio in a fleet of at least 50 vehicles. [2]
References
- ^ MacKechnie, Christopher (May 31, 2016). "Transit 101: The Spare Ratio". About.com. Retrieved August 1, 2016.
- ^ "FTA Circular 9030.1C: Urbanized Area Formula Program: Program Guidance and Application Instructions". Federal Transit Administration. August 27, 2012. p. 5. Retrieved August 1, 2016.