[Winniesboy]

Your mention of the Dorset tank training area reminds me of a road sign I once saw on one of the narrow country lanes there:

Caution - Tank Drivers under Instruction

Precisely what other road users (I was on a bicycle!) were expected to do when confronted by an incompetently driven tank occupying the entire width of the road was unclear...

[real saxophonist]

On HWY 67, around Ft. Stewart, GA, there are signs that say 'Deer Crossing', then there are signs that say 'Tank Crossing'.