Like I say, it was a simple model developed as part of a summer intern project. It was also quite a few years ago now, so I don't remember many details. Regard

Like I say, it was a simple model developed as part of a summer intern project. It was also quite a few years ago now, so I don't remember many details. Regardless, I don't think energy from vehicle/road production is a valid consideration for a company assessing the environmental impact of their fleet.