The record is the deliverable
In a commercial fleet, tracking data supports decisions. In a government fleet it supports audit, and the standard is different.
What an audit asks is specific: which vehicle, driven by whom, on what date, over what route, drawing how much fuel, for what purpose. A system that cannot answer all six has gaps that get filled by assumption.
Timestamped trip history with route replay answers the first five directly. The sixth is a process question, but it becomes answerable once the others are recorded.