Baltimore is a
big container port, although I don't know if it can handle post-panamax vessels or not.
In any event, Halifax's real problem is CN and the lack of double tracking to Montreal and points west. This problem doesn't exist in the urban northeast of the U.S.
The choke point isn't Halterm or the port of Halifax, it's the railway. It doesn't really matter how big or deep your harbour is............
Whatever happened to the "Atlantic Gateway"?