1. A fleet management computer system comprising: one or more memory storage areas; and one or more processors; wherein said one or more processors are, collectively, configured to: receive telematics data collected by one or more vehicle sensors associated with a vehicle, wherein said telematics data is indicative of the engine run time and engine idle time of said vehicle; and determine, based at least in part on said telematics data, a corrected engine idle time percentage indicating a percentage of said vehicle's engine running time that said vehicle's engine was idling exclusive of engine idle time caused by travel delays during a certain time period.