Looked at a map that we used for personal game so key is already defined by concent.
Grid 300m squares
https://www.flickr.com/photos/56805875@ ... ed-public/
Widest Road - 2 lane Hedged unlimited weight (100 tonne). This by default includes bridge max practical limit.
Medium roads narrow 2 lane (not 2 tanks wide) 15 tonnne road and bridges.
Brown Track ` lane dirt track 5 tonne - dashed (as OS map) not hedged.
Water features unquaified so as rules, difficult obsticle.
Inside green lines Trees no qualification so 80m visability, difficult going impassabe to high mobility wheeled.
Houses default MG so all shown to scale. Standard maneouvre group so with cellars.
Hills are a bit complex but runs to standard 1 countour heights shown,
Thin dark lines 1/2 contour difficult going hedge.
Thick dark lines Impassible board edges.
Thick Green line effectively wood edge and satart line for game. Woods are default 3 contours high.
So that is what I use as a typical game not written up for a wider audiance.
Generally we do not specify gates in hedges. However in multiple evening games the gates are recorded by photo so that they and any breaches can be accurately recorded.
Therefor I consider outright rants illogical I have only defined what we consider the minimum, perhaps for a wider audiance a more precise key would be needed.