Are there commercial trucks that use these routes? In the US, i've been thinking it may be wise to lower axle loads and ad a pair of axles to most types of trailers. This would make a massive difference in pavement and bridge longevity, and it would decrease the incidence of warped asphalt. Perhaps mileage taxes to other vehicles, and congestion pricing for urban areas could start to put a dent in the state of repair in many roads and highways, and decrease how often repaves and other things need to be done.

Too much common sense i guess.

- Andy