Pennsylvania

===Highways and roads===
{{See also|List of Interstate Highways in Pennsylvania|List of state routes in Pennsylvania|Pennsylvania Turnpike}}
PennDOT owns {{Convert|39861|mi}} of the {{convert|121770|mi}} of roadway in the state, making it the fifth-largest state highway system in the United States.<ref name="PennDOT fact 7">"Pennsylvania Department of Transportation Fact Book", p. 7.</ref> The [[Pennsylvania Turnpike]] system is {{Convert|535|mi}} long, with the mainline portion stretching from [[Ohio]] to Philadelphia and [[New Jersey]].<ref name="PennDOT fact 7" /> It is overseen by the [[Pennsylvania Turnpike Commission]]. Another major east–west route is [[Interstate 80 in Pennsylvania|Interstate 80]], which runs primarily in the northern tier of the state from Ohio to New Jersey at the [[Delaware Water Gap]]. [[Interstate 90 in Pennsylvania|Interstate 90]] travels the relatively short distance between Ohio and New York through [[Erie County, Pennsylvania|Erie County]], in the extreme northwestern part of the state.

Primary north–south highways are [[Interstate 79 in Pennsylvania|Interstate 79]] from its terminus in Erie through [[Pittsburgh]] to [[West Virginia]], [[Interstate 81 in Pennsylvania|Interstate 81]] from [[New York (state)|New York state]] through [[Scranton, Pennsylvania|Scranton, Lackawanna County]] and [[Harrisburg, Pennsylvania|Harrisburg]] to [[Maryland]] and [[Interstate 476]], which begins {{Convert|7|mi|km}} north of the [[Delaware]] border, in [[Chester, Pennsylvania|Chester, Delaware County]] and travels {{Convert|132|mi|km}} to [[Clarks Summit, Pennsylvania|Clarks Summit]], where it joins I-81. All but {{Convert|20|mi|km}} of I-476 is the Northeast Extension of the [[Pennsylvania Turnpike]]. The highway south of the Pennsylvania Turnpike is officially called the "Veterans Memorial Highway", but is commonly referred to colloquially as the "Blue Route".