A few things came to mind for me: - Many of these emissions are described as being from paving, so more frequent repaving caused by increased wear would aggrav

A few things came to mind for me: - Many of these emissions are described as being from paving, so more frequent repaving caused by increased wear would aggravate the issue. - These issues seem to be related to temperature, and I suspect that the increased wear by heavier vehicles is largely caused by increased friction (which would increase temperature-related emissions). - Cracks and potholes expose more asphalt, and are largely caused by the heavier vehicles.