Answer:

lirr

Answer	Crossword Clue
LIRR	Suburban train to NYC
LIRR	Nassau Co. line
LIRR	Part of N.Y.C.'s MTA

LIRR	NYC transit abbr.
LIRR	N.Y.C. commuter line
LIRR	Penn Sta. is its busiest terminal
LIRR	Commuter line with a Montauk Branch: Abbr.
LIRR	NYC commuter line
LIRR	Carrier from Montauk Pt. to NYC
LIRR	Carrier to Penn Sta.
LIRR	Transp. to the Hamptons

LIRR	N.Y. commuter line with a Hempstead Branch
LIRR	NYC-to-Montauk system
LIRR	Penn Sta.-to-Suffolk County train system
LIRR	NYC-to-Suffolk County line
LIRR	Way to get to N.Y.'s Citi Field
LIRR	Train line to NYC
LIRR	Train to NYC
LIRR	Commuter line to Penn Station

LIRR	Dashing Dan used to be in its logo: Abbr.
LIRR	Commuter's line to N. Y. C.
LIRR	Well-known commuters' road.
LIRR	Well-publicized railroad.
LIRR	Common carrier in the news: Abbr.
LIRR	Well-known railroad: Abbr.
LIRR	125-year-old railroad: Abbr.
LIRR	Initials important to N. Y. C. commuters.

LIRR	N.Y. commuters line
LIRR	N.Y. suburban line
LIRR	N.Y. line
LIRR	Penn Sta. line
LIRR	A way into or out of N.Y.C.
LIRR	Train for many N.Y. commuters
LIRR	Certain transportation to N.Y.C.
LIRR	Line to the Hamptons, for short

LIRR	N.Y. commuter's transport
LIRR	Transportation to N.Y.C.
LIRR	Penn Station initials
LIRR	Way to get to N.Y.C.
LIRR	N.Y. commuter line