 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (January 2011) |
 East Portal of Squirrel Hill Tunnel in the snow | |
| Overview | |
|---|---|
| Location | Pittsburgh, Pennsylvania |
| Coordinates | 763-4-1, 870+00 west portal 763-4-1, 912+25 east portal |
| Route |    I-376 / US 22 / US 30 (Parkway East) |
| Start | I-376 Squirrel Hill interchange |
| End | Nine Mile Run valley and Commercial St. Bridge |
| Operation | |
| Work begun | 1945 |
| Constructed | Twin bore, concrete with ceramic tile lining |
| Opened | June 5, 1953 |
| Owner | PennDOT |
| Operator | PennDOT |
| Traffic | automobile |
| Toll | none |
| Vehicles per day | 106,000 |
| Technical | |
| Length | 4,225 feet (1,288 m) |
| No. of lanes | 4 |
| Operating speed | 55 mph |
| Tunnel clearance | 13.5 feet (4.1 m) |
| Width | 28 feet (8.5 m) |
| Grade | 2.5% (east to west) |
| Route map | |
 | |
The Squirrel Hill Tunnel is a tunnel in Pittsburgh, Pennsylvania, United States. It serves as an eastern gateway to the city for I-376 and was completed in 1953 after 8 years of construction and at a cost of US$18 million. At the time of opening it was the single largest investment by the Pennsylvania Department of Transportation. It is 4,225 feet (1,288 m) long and is a twin-bore tunnel with 8 cross passages.