"Good point but how do you date a cart track?"

As a bored yoof working on a farm I made it an obsessive point of honour to always keep the tractor wheels on the same line across the field. It's surprising how quickly that makes deep ruts though the farmer tends to shout and I shouldn't be surprised if they are still there. They can be validly described as being of ritual origin though not quite prehistoric.

If you stand above Stonehenge bottom and look across at the opposite steep downslope on the other side of the roads there are faint cart track marks indicated by slight grass colour variations (or were when I looked maybe 7 years ago) that may be co-extensive with what they've dug up.