Mr Evil wrote:mjr wrote:...Surely that didn't appear in 3 days?..
After the snow earlier this year, many potholes of that size appeared around here in just a few days.
The quickest ones were on roads with fields above them, where meltwater ran over the roads continuously for days afterwards. A swirling torrent of water can hollow out a large hole almost overnight.
Which also begs the question about how much changed farming and land use policies affect the roads.
Removal of trees and hedges and practise of intense agriculture is a big problem in terms of soil-loss; trees in particular are very good at soaking up excess rain and the releasing it slowly. Similarly, compacted ground from sheep/cows can increase run-off. It's not so long since some insurance companies seriously considered buying land on catchments of rivers prone to flooding and planting trees as it would have been cheaper than paying claims.
Then there is the ubiquitous paved drive instead of a garden, plus removal of street trees. Around where I live, my front garden is an oasis of green (tree, yew hedges, shrubs with a small original tarmac patch for a car which I will at some point replace with one of those plastic grid porous surfaces) surrounded by brick-paved driveways. few years ago, a company went door-knocking to offer brick-paved driveways at a "special price when we are in the area." Many of the locals succumbed to the hard sales promising increased house value and reduced maintenance, in many cases they paved both back and front! (Then the moan that bird population has dropped and blame cats/crows/magpies etc).
So I've some sympathy for the local Highways Authorities, as they face a triple-whammy of: more heavy vehicles (not just HGVs but lots of SUVs)- remembering that the damage increase is proportional to the square of axle weight, more water run-off, plus much less funding.
If I were in charge (
) I would start by having a "paved driveway/garden" tax on a square-meter basis (anything over the footprint of one very small car/a decent bike-shed would incur a charge as would parking on a road or pavement), rebates for garden and street trees, an agricultural policy that penalised removal of trees/hedges and rewarded planting trees/hedges to help hold back water and preserve soil, and tax road vehicles by the level of damage they cause. That way, when the highways authorities do repair the road, there's a fighting chance of it remaining in decent nick.
TPO