If by 'main line' you are referring to the line through Paterson, that was Erie
Went from JC via Rutherford (splitting at Rutherford into Bergen Main and Main) the main went on wnw to Carlton Hill,(tracks still in up to the river) crossed the Passaic River to Passaic Park and up the center of Main Avenue Passaic where it veered off on its own ROW on up north thru Clifton to the yards (still exist) East of Getty Ave. (tracks still exist to just south of Rte 46.
where it joined the Newark division (now the double tracked NJT) behind St. Josephs hospital.
The DL&W went from where the Boonton line crossed the NY&GL at Mountain View (Wayne) and on East (spur still exists) to where I 80 is now. I 80 runs on the DL&W row accross the Passaic river and around Garret Mountain, to where the NJT line now runs on it on in to Hoboken from the Newark line junction (now the Newark industrial) of the old Erie.
See also
http://erielackhs.org/ELHS/ELHSDepartments.htmls for more info.