pgRouting mapconfig.xml

Hey,

When using osm2pgrouting, is it only possible that one way has only one class_id?

For example if I have way: bridge = yes , highway= motorway.
Is it possible to calculate my costs with both tags or is it only possible to use one of them.

Or am I wrong and pgRouting creates two ways with same start and end point but different classes?

Best regards,

Markus