When I am out walking, I often look at the terrain, to get an impression of what I am trying to represent on the table.
Hedges always make me question; how exactly do we represent crossing them on a table. I'm thinking WW2 here. Even the normal English ones are often 2m high and a meter thick. How does a WW2 section cross it?
In the Commander series of rules, hedges are linear obstacles. So certain troop types must stop when reaching the near side, and then can cross in the next movement turn.
Other sets of rules I have played just place a reduction of movement on those troop/unit types affected by the hedge.
It is worth noting that pre machine cutting of hedges, they used to be about 4' high and layed, making them lower and much more dense than modern ones. However this is for the UK, but not sure what it was like in Europe, other than seeing all those photos of the Bocage. So you could get through a hedge, but it would take time and certainly disorder the troops crossing it if say playing the SYW.
Most hedges have gaps, gates, stiles or just spots where there is a hole or just thinner vegetation growth. I think the delay for infantry crossing hedges is more running up and down to find suitable gaps to get through, rather than forcing their wasy through through or climbing over in some way.
That makes sense. Bocage, however...