On 06/03/2018 21:35, Steve Walker wrote:

You can probably ignore the cars. Many, many years ago, a TV programme
(it may have been Tomorrow's World) did a story about axle loading and
badly loaded trucks. This was back in the days of a 32 ton maximum. They
tested and concluded that one badly loaded truck caused as much
damage/wear and tear as 125,000 cars!

Road damage is proportional to the 4th power of the weight. This formula
is widely used.

Andy