The first section of the Pennsylvania Turnpike, one of the first long-distance limited-access highways in the U.S., opened to traffic.

The Pennsylvania Turnpike, sometimes shortened to Penna Turnpike or PA Turnpike, is a controlled-access toll road which is operated by the Pennsylvania Turnpike Commission (PTC) in Pennsylvania. It runs for 360 miles (580 km) across the southern part of the state, connecting Pittsburgh, Harrisburg and Philadelphia, and passes through four tunnels as it crosses the Appalachian Mountains. A component of the Interstate Highway System, it is part of I-76 between the Ohio state line and Valley Forge, I-276 between Valley Forge and Bristol Township, and I-95 from Bristol Township to the New Jersey state line.