[OSM-talk] Bridge relation on way going under?

[Borbus]

I think a much more useful application than those suggested already is
to identify all of the bridges that cross over a way.  It's easy to find
all of the ways that go under a way, but what use is that?  It's quite
important for waterways in general to be able to find every bridge that
will be crossing over your path, and it's also necessary if routing for
a tall vehicle on roads.

-- 
Borbus.