Interstate 579

Interstate 579
Interstate 579
Crosstown Boulevard
	I-579 highlighted in red
Route information
	Auxiliary route of I-79
	Maintained by PennDOT
Length	2.73 mi (4.39 km)
Existed	1962–present
NHS	Entire route
Major junctions
South end	PA 885 / Liberty Bridge in Pittsburgh
	PA 380 in Pittsburgh
North end	; I-279 / US 19 Truck / PA 28 in Pittsburgh;
Location
Country	United States
State	Pennsylvania
Counties	Allegheny
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future; Pennsylvania State Route System; Interstate; US; State; Scenic; Legislative;

Interstate 579 (I-579) is a north–south Interstate Highway entirely within Pittsburgh, Pennsylvania. The highway is 2.73 miles (4.39 km) long. I-579 is also known as the Crosstown Boulevard since it crosses the backside of Downtown Pittsburgh.

The northern terminus of I-579 is at I-279 beyond the north end of the Veterans Bridge; the southern terminus splits to the Liberty Bridge southbound and Boulevard of the Allies eastbound, which leads to I-376 east. The intersection of I-579 and I-279 is in one direction only; northbound traffic on I-579 can proceed only northbound on I-279 while only southbound traffic on I-279 can exit onto I-579.

I-579 allows Liberty Bridge traffic easy access to I-279, and I-279 southbound traffic easier access to PPG Paints Arena, downtown, and eastern regions of the city, while I-279 southbound continues to Acrisure Stadium, PNC Park, and to westbound I-376 which leads to Pittsburgh International Airport.