Interstate 78

	type	Main
	map	Interstate 78 mappng
	year Established	1957
	length Mi	14356
	length Km	23104
	direction A	West
	direction B	East
	terminus A	I-81 in Union Township, PA
	terminus B	Canal St in Manhattan, NY
	junction	I-476 / PA Tpk NE Ext near Allentown, PA <br> I-287 in Bedminster, NJ <br> NJ 24 in Springfield, NJ <br> GSP in Union / Hillside, NJ <br> I-95 / NJTP in Newark, NJ

Interstate 78 (abbreviated '''I-78''') is an Interstate Highway in the Northeast United States , running 144 miles (231 km) from Interstate 81 northeast of Harrisburg, Pennsylvania , through Allentown, Pennsylvania , and northern New Jersey to the Holland Tunnel and downtown New York City .

ROUTE DESCRIPTION

Pennsylvania

See Also: Interstate 78 in Pennsylvania

AUXILIARY ROUTES

and then north to the Bruckner Interchange .]]
All of I-78's Auxiliary Routes serve New York City. However, none of these routes actually intersect I-78, following the route's truncation to the east end of the Holland Tunnel .

Interstate 278 runs from U.S. Route 1/9 near Elizabeth, New Jersey over the Goethals Bridge , through Staten Island , over the Verrazano Narrows Bridge and through Brooklyn and Queens , and across the Triborough Bridge into The Bronx to end at I-95 at the Bruckner Interchange . I-278 was planned to extend west from Elizabeth to I-78 in Union Township, Union County, New Jersey , and was to intersect I-78 at the east end of the Williamsburg Bridge in Brooklyn. Until 1972, I-278 ran along Interstate 895 and a proposed extension to I-95, while I-278 east of I-895 was I-878.

Interstate 478 is an unsigned designation for the Brooklyn-Battery Tunnel , a spur from I-278 into Lower Manhattan . Plans were made to continue it north along the West Side Highway ( Route 9A ) to I-78 at the Holland Tunnel, but have been canceled. Older plans would have given it the same purpose - connecting I-78 with I-278 - but along the Manhattan Bridge .

Interstate 678 runs from I-278 at the Bruckner Interchange south over the Bronx-Whitestone Bridge to John F. Kennedy International Airport . It was to intersect I-78 at its south end. Original plans took I-678 west on the Grand Central Parkway to I-278.

Interstate 878 is an unsigned designation for part of New York State Route 878 , a short east-west freeway on the north edge of JFK Airport . It was once planned as part of I-78, and now intersects I-678. The number was assigned in 1989.

A former Interstate 878 existed from 1959 to 1972 along present I-278 east of Interstate 895 . (I-895 was part of I-278.)

REFERENCES

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