|Maintained by PennDOT|
|Length:||13.20 mi (21.24 km)|
|Existed:||1972 – present|
|South end:||I-376/US 22/US 30 in Pittsburgh|
|I-579/PA 28 in Pittsburgh|
|North end:||I-79 in Franklin Park|
Interstate 279 (abbreviated I-279) is a north–south Interstate Highway spur that lies entirely within Allegheny County, Pennsylvania. Its southern end is at Interstate 376 at the Fort Pitt Bridge in Pittsburgh, and the north end is in Franklin Park at Interstate 79. It primarily serves at the main access route between Pittsburgh and its northern suburbs.
Interstate 279 is locally referred to as Parkway North. Its southern terminus is at Interstate 376 in downtown Pittsburgh. It runs concurrently with U.S. Route 19 Truck from its southern terminus to exit 4. (US Route 19 Truck continues on Interstate 376 west.) I-279 crosses the Fort Duquesne Bridge over the Allegheny River, providing easy access to Heinz Field and PNC Park. Interstate 579 intersects I-279, but is only accessible by southbound traffic; likewise, traffic from I-579 can only head northbound on I-279 by the Interstate 279 Interchange. I-279 features two reversible high-occupancy vehicle (HOV) lanes. The HOV lanes end at exit 5, which is an interchange with US 19. The road becomes more suburban and rural as it continues to head north. It has two additional interchanges, Bellevue/West View and Camp Horne Road. After Camp Horne Road, there are no exits until its terminus five miles later. The interstate terminates at its parent, Interstate 79. Like the interchange with I-579, this is also a partial interchange. Traffic on I-279 is only permitted to exit northbound on I-79, while only traffic heading southbound on I-79 can exit on to I-279 south.
Interstate 279 was first proposed in 1958, to run along what is now I-79 between the current I-376 in Carnegie and the current I-279 in Franklin Park. In 1972, its route was swapped with I-79, putting I-279 onto its current route, although only the portion in downtown and the Fort Duquesne Bridge were built at the time.
I-279 from Fort Duquesne Bridge to its current northern terminus in Franklin Park was approved on June 4, 1975 but constructed from 1985 to 1989. From 1997 to 2003, various ramps, the Fort Pitt Bridge, and nearby tunnels were reconstructed. A direct connection from I-279 south to I-376 east was opened in 2002.
A tragedy occurred on the reversible HOV lanes in 1995 when a negligent highway worker failed to close the outbound gates, leading to a head-on collision that killed six. In 2006, to help prevent a repeat of this incident, automatic "fast acting gates" were activated at the southern entrances to these HOV lanes in downtown Pittsburgh.
During the last phases of construction of I-279 in 1987, a long-forgotten cemetery dating from the 19th century was unearthed near the site of the current I-279/I-579 split. Archaeologists spent four months exhuming the graves for cultural studies at the Smithsonian Institution, significantly putting PennDOT behind schedule to finish construction. It was determined that the graves belonged to Swiss and German immigrants that were members of a local church located next door to the cemetery in what was then Allegheny City, with 727 graves buried at the half-acre (0.20 ha) site between 1833 and 1861. The graves were forgotten about by 1911 when the church did an addition to the building and had the foundation unintentionally go through about fifteen graves, with the churchyard housing the cemetery later becoming a parking lot in 1950. Aside from a pair of stillborn twins, none of the graves were identified, and archaeologists were unable to find any living descendants due to the obscurity of the cemetery. The remains were reburied with one marker at the church's current cemetery in the Troy Hill section of Pittsburgh in 2003 after the Smithsonian Institution finished studying them; the congregation itself disbanded in 1984 after PennDOT bought the church property via eminent domain for I-279 and only had 21 members at that point. Today, it is the largest number of 19th century graves (Native American graves notwithstanding) ever studied archaeologically in America.
The entire route is in Allegheny County.
|Location||Mile||km||Old exit||New exit||Destinations||Notes|
|Pittsburgh||6A||I-376 (Penn-Lincoln Parkway, US 22, US 30) – Downtown Pittsburgh, Monroeville, Pittsburgh International Airport||Southbound exit and northbound entrance|
|6C||1A||Fort Duquesne Boulevard – Convention Center, Strip District||Southbound exit and northbound entrance|
|Allegheny River||Fort Duquesne Bridge|
|Pittsburgh||7A||1B||North Shore - Heinz Field, PNC Park, Carnegie Science Center||No northbound entrance|
|7B||1C||PA 65 north (Ohio River Boulevard) to US 19|
|9th Street||HOV only: southbound exit and northbound entrance|
|7C||1D||PA 28 north / Chestnut Street, Ohio Street – Etna||Southbound exit is via exit 2B|
|8A||2A||I-579 south (Veterans Bridge)||Southbound exit and northbound entrance|
|8B||2B||East Street||Southbound exit and northbound entrance|
|9||3||Hazlett Street||Northbound exit and entrance|
|10||4||Venture Street||Southbound exit and entrance; provides access to US 19 Truck north|
US 19 Truck north (McKnight Road) / Evergreen Road
|North end of US 19 Truck overlap; northbound exit and southbound entrance|
|Ross Township||12||5||US 19 (Perrysville Avenue)|
|14||7||Bellevue, West View|
|Ohio Township||15||8||Camp Horne Road|
|Franklin Park||20||I-79 north – Erie||Northbound exit and southbound entrance|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- "Pennsylvaniua Highways - Interstate 279". Pennsylvania Highways. September 19, 2010.
- Kitsko, Jeffrey. "Interstate 279". Pennsylvania Highways.
- Schmitz, Jon (June 11, 2009). "Roads unite to form new Interstate 376". Pittsburgh Post-Gazette. Retrieved 2009-06-11.
- Prince, Adam. "The I-279/376 Downtown Connector". GribbleNation.
- Grata, Joe (2006-05-19). "New HOV gates start Monday on Parkway North". Post-gazette.com. Retrieved 2010-06-01.
- Kitsko, Jeffrey. "Interstate 279 Exit List". Pennsylvania Highways.
- Kitsko, Jeffrey. "Interstate 279". Pennsylvania Highways.