> No need to be silly. Surely these tests are done in a suitable location
My tests were done in the middle of a former cold war airstrip. This link should show the complex in a satellite view: https://www.google.com/maps/place/K%C3%B8reteknisk+Anl%C3%A6...
Notice the darker patch of tarmac. That is extra-slippery when wet and has a sprinkler system on the grass next to it.
> No need to be silly. Surely these tests are done in a suitable location
My tests were done in the middle of a former cold war airstrip. This link should show the complex in a satellite view: https://www.google.com/maps/place/K%C3%B8reteknisk+Anl%C3%A6...
Notice the darker patch of tarmac. That is extra-slippery when wet and has a sprinkler system on the grass next to it.