Truck job analytics in truck*seconds

Analytics tab for trucks shows 2 metrics: jobs, and transported count. But it doesn't take into account the range. So my top items are ores that are transported in bulk from excavators to a nearby storage. But my logistics system is strained by some goods that have to be transported to a different part of the map. It would be cool to have a metric that reflects the actual load that an item type puts on the logistic system.
The most simple metric seems to be how many seconds the trucks were busy transporting that type of item.