Interstate 579

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Interstate 579

Crosstown Boulevard
I-579 highlighted in red
Route information
Auxiliary route of I-79
Maintained by PennDOT
Length2.73 mi[1] (4.39 km)
NHSEntire route
Major junctions
South end PA 885 in Pittsburgh
Major intersections PA 380 in Pittsburgh
North end
CountryUnited States
Highway system
PA Turnpike 576I-579 PA 580
PA 478I-479 I-480
PA 875I-876 PA 876

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.

Route description

I-579 northbound approaching terminus at I-279/US 19 Truck and PA 28 in Pittsburgh
I-579 running through Downtown Pittsburgh

I-579 begins at an interchange with Pennsylvania Route 885 (PA 885; Boulevard of the Allies) and the approach to the Liberty Bridge over the Monongahela River in Downtown Pittsburgh, heading to the north-northeast as a four-lane freeway. At the southern terminus, the highway has a northbound exit and southbound entrance providing access to 6th Avenue and Forbes Avenue near Duquesne University. The road passes several skyscrapers as it comes to an interchange at Centre Avenue with a northbound exit and southbound entrance that provides access to the PPG Paints Arena. Immediately following is a left exit in the northbound direction and a southbound entrance that connects to 7th Avenue that serves the David L. Lawrence Convention Center. At this point, I-579 runs to the west of the former site of the Civic Arena and comes to the PA 380 interchange, a northbound exit and southbound entrance, in addition to a southbound exit and northbound entrance accessing 6th Avenue and 7th Avenue. The freeway turns north as it passes over railroad tracks to the east of Union Station, the Amtrak station serving Pittsburgh. Here, it is seven lanes total with three travel lanes in each direction and two reversible high-occupancy vehicle lanes (HOV lanes) in the center. The HOV lanes connect to Bedford Avenue near the Civic Arena at the south end. The highway turns northwest as it crosses the Allegheny River on the Veterans Bridge. A short distance after the bridge, I-579 ends at an interchange with I-279/US Route 19 Truck (US 19 Truck) and PA 28, at which point the route merges into northbound I-279 with ramps to and from westbound PA 28.[2]


Interstate 479


I-579's roots go back to 1966 when the short 0.7-mile (1.1 km) Crosstown Boulevard from the Boulevard of the Allies (PA 885) to Bigelow Boulevard (PA 380) was designated as Interstate 479 (I-479).

Interstate 876

HistoryA brief renumbering of I-479
NHSEntire route

Despite the choice of number, its parent I-79 was only completed in certain areas; there would be no connection of the two routes until 1989. By 1971, with only little progression of I-79 near I-479's northern terminus and easy (but indirect) access to then-I-76 (now I-376 Parkway East) from the southern terminus, I-479 was renumbered as Interstate 876 (I-876).

This was renumbered again on October 2, 1972, as its current designation of I-579; in addition, I-79's designation from Pittsburgh to Robinson Township was "swapped" with I-279's segment south of the Ohio River from PA 51 to the Parkway West interchange.[3] In 1989, both of I-79's auxiliary routes were finally connected with the openings of I-279 (Parkway North) from the Fort Duquesne Bridge/North Shore to its northern terminus at I-79 in Franklin Park and the Veterans Bridge which extended I-579 across the Allegheny River to its new northern terminus at I-279 in Pittsburgh's East Allegheny neighborhood.

In 2019, the I-579 Cap Urban Connector Project began in order to build a pedestrian park over I-579 with the goal of better connecting downtown to the Hill District. The project was completed in 2021 and the park opened to the public on November 22, 2021.[4][5][6]

Exit list

The entire route is in Pittsburgh, Allegheny County. [7]All exits are unnumbered.


To US 19 / PA 51 – Liberty Bridge

PA 885 south (Boulevard of the Allies) to I-376 east – Oakland, Monroeville
Continuation beyond southern terminus
0.0990.159Centre Avenue – PPG ArenaNorthbound exit only
0.1640.2647th Avenue – Convention CenterNorthbound left exit and southbound entrance
PA 380 east (Bigelow Boulevard)
Western terminus of PA 380; northbound exit and southbound entrance
0.5360.8637th Avenue/6th AvenueSouthbound exit and northbound entrance; access to Convention Center and PPG Arena
Veterans Bridge over the Allegheny River
PA 28 north – Etna
Northbound exit and southbound entrance
I-279 north / US 19 Truck north
Exit 2A on I-279
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021. Retrieved June 7, 2022.
  2. ^ Google (January 15, 2011). "Overview Map of Interstate 579" (Map). Google Maps. Google. Retrieved January 15, 2011.
  3. ^ "Interstates Renumbered". The Pittsburgh Press. February 24, 1972. p. 8. Retrieved November 30, 2017 – via
  4. ^ "I-579 Cap Urban Connector Project: Bridging a Critical Gap to Revitalize the Hill District". Pennsylvania Department of Transportation. Retrieved August 23, 2020.
  5. ^ "I-579 Cap Urban Connector Project". Sports & Exhibition Authority of Pittsburgh and Allegheny County. Retrieved August 23, 2020.
  6. ^ Belko, Mark (June 14, 2019). "Righting a wrong: New park over I-579 to reconnect Downtown and the Hill District". Pittsburgh Post-Gazette. Retrieved August 23, 2020.
  7. ^ a b Bureau of Maintenance and Operations (January 2016). Roadway Management System Straight Line Diagrams (Report) (2015 ed.). Pennsylvania Department of Transportation. Retrieved June 26, 2016.

External links