DIAGONAL BUNKER TESTS
Placing a bunker diagonally on bridges and on the woods road like this still isn't guaranteed to block the roads.
These tests show that if you plot your movement lines with extreme care and accuracy, the PzIV's CAN get past.
WARNING- Nevertheless,no matter how carefully you plot any type of tank, there's always the risk that he'll clip the bunker and/or the woods or bridge edge and jam his brakes on, causing a big traffic jam as he starts bouncing around..
BRIDGE, the tanks get through
WOODS, the tanks get through
I even tried the tests with Tigers and they got through too.
Note the Tiger hanging its tracks in thin air as it passes the bunker on the bridge in the inset, funny..:)