The presidents of the MTA's bus, subway and commuter train operations have submitted to headquarters possible targets for funding. Some board members and advocacy groups, like the Straphangers Campaign and the Riders Alliance, also have pitched suggestions. They include extending the J train on weekends to Broad St., extending the B37 bus route to downtown Brooklyn, returning the M104 to 42nd St., restoring weekend service on the Long Island Rail Road's West Hampton branch and extending Metro-North Railroad trains with additional cars to reduce crowding.