Local or Express »
While I haven't spent a ton of time in cities with subways or other public transportation - and the public transportation here in Charlotte is limited - it seems that the term express is typically used to indicate a route that doesn't stop as often.
On the New York subway for instance, the express route will go directly from uptown to downtown - perhaps with only a stop or two around Time Square. Meanwhile, the local route stops at every platform along the way.
