Vehicles and plant are two different tracking problems
Treating them the same is why most construction deployments underdeliver.
A road vehicle is measured on journeys, routes and fuel per kilometre. A machine is measured on engine hours, idle share, and fuel per hour of actual work.
The metric that matters on plant is the ratio of productive running to total running. A machine that is powered for ten hours and working for four is burning a shift of fuel for less than half a shift of output, and nothing about that shows up in a distance report.