Do Hierarchies work across feature classes, or only within?

Discussion created by higgicd on May 7, 2013
Latest reply on May 9, 2013 by pstevens-esristaff
I am looking to create a network out of two separate road files - one consists of highways and another of local and arterial roads.  I want the highways to be favored for the route analysis so that users traverse their local roads to reach the highway network, but was confused about whether hierarchies work across feature classes in a network, or if they only work within a single feature class.  The help files seem to suggest the latter.