B6.2 -- "(unless that LOS is traced only through the road depiction of the Bridge)."
But for bridge counters: "Bridge counters are Inherent Terrain (B.6) but LOS into/through
its hex does not incur the Bridge Hindrance/TEM if it crosses only road
hexsides
(exclusive of vertices) of that hex."
The artwork matters for printed bridges. The hexsides matter for bridge counters.
B6.3 muddies the water: "traced only through the road depiction of that bridge
hex."
B6.31 returns to the bridge art versus counter distinction:
Direct Fire against targets on a non-pontoon bridge (not against the
bridge itself) which enters the bridge other than across the road depiction (or
road hexside of a Bridge counter’s hex; 6.2) has a TEM of +1 regardless of
bridge construction type.
Given the symmetry between 6.2 and 6.31 in making a distinction between printed and counters, I think that Michael has it right.