Answer
-Idle Time over Engine time summary = Percentage of time the vehicle was not moving while ignition remained on Idle Time % = (Total Idle Time per Vehicle) / (Total Vehicle's Engine Time).Idle time for commercial vehicle = Time between(duration) ignition on and ignition off minus travel time within this time period.
-Idle time from gpsreadingshsitory where reason in ('i','s','I','S') Engine time = Time between Ignition on and Ignition Off