Editing Interstate 78 (section)

===Pennsylvania===
{{main|Interstate 78 in Pennsylvania}}
[[File:Interstate 78 and 81 junction, northbound.jpg|thumb|The I-78 interchange approaching [[Interstate 81|I-81]] north in [[Union Township, Lebanon County, Pennsylvania|Union Township, Pennsylvania]]]]
[[File:2022-08-16 08 31 14 View west along Interstate 78 just west of Exit 67 in Bethlehem, Northampton County, Pennsylvania.jpg|thumb|I-78 westbound past the [[Pennsylvania Route 412|PA&nbsp;412]] interchange in [[Bethlehem, Pennsylvania|Bethlehem]] in the [[Lehigh Valley]]]]
I-78 begins at a [[directional T interchange]] with [[Interstate 81|I-81]] in [[Union Township, Lebanon County, Pennsylvania|Union Township]], about {{convert|25|mi|km}} northeast of [[Harrisburg, Pennsylvania|Harrisburg]]. Near the east end of the county, at exit&nbsp;8, [[U.S. Route&nbsp;22]] (US&nbsp;22) merges with I-78, and runs concurrently for the next {{convert|43|mi|km}} through [[Berks County, Pennsylvania|Berks]] and [[Lehigh County, Pennsylvania|Lehigh]] counties.<ref>{{google maps |url = https://maps.google.com/maps?f=q&hl=en&geocode=&q=Bethel,+PA&ie=UTF8&ll=40.450605,-76.065216&spn=1.92281,3.641968&z=8&om=1 |title = Overview Map of I-78 in Lebanon, Berks, and Lehigh Counties |access-date = August 31, 2007 }}</ref>

At exit&nbsp;51, in [[Upper Macungie Township, Pennsylvania|Upper Macungie Township]], US&nbsp;22 leaves the highway. Drivers on I-78 eastbound must use this exit to access [[Interstate 476|I-476]], also known as the Northeast Extension of the [[Pennsylvania Turnpike]], and westbound travelers must use exit&nbsp;53 (northbound [[Pennsylvania Route&nbsp;309]], PA&nbsp;309) and then westbound US&nbsp;22. From exits&nbsp;53 to 60, I-78 runs concurrently with PA&nbsp;309. The six-lane overlap bypasses the city of [[Allentown, Pennsylvania|Allentown]] to the south and crosses [[South Mountain (Eastern Pennsylvania)|South Mountain]].<ref>{{google maps |url = https://maps.google.com/maps?f=q&hl=en&geocode=&q=I-78,+Allentown,+PA&sll=40.486649,-76.065216&sspn=0.015014,0.028453&ie=UTF8&ll=40.570464,-75.538559&spn=0.239926,0.455246&z=11&om=1 |title = Overview Map of I-78 Southeast of Allentown |access-date = August 31, 2007 |link = no }}</ref><ref>{{google maps |url = https://maps.google.com/maps?f=q&hl=en&geocode=&q=I-78,+Allentown,+PA&sll=40.486649,-76.065216&sspn=0.015014,0.028453&ie=UTF8&ll=40.564294,-75.483027&spn=0.001875,0.003557&t=k&z=18&om=1 |title = Overview Satellite Image of I-78 with Six Lanes |access-date = August 31, 2007 |link = no }}</ref>

At exit&nbsp;60 (A–B going westbound), PA&nbsp;309 yields south to [[Quakertown, Pennsylvania|Quakertown]].<ref name="google">{{google maps |url = https://maps.google.com/maps?hl=en&q=I-78,+PA&um=1&sa=N&tab=wl |title = Interstate 78 in Pennsylvania |access-date = August 31, 2007 |link = no }}</ref> Approximately {{convert|6|mi|km|spell=in}} east, there is an interchange between [[Pennsylvania Route 412|PA&nbsp;412]] and I-78 in [[Hellertown, Pennsylvania|Hellertown]], serving [[Bethlehem, Pennsylvania|Bethlehem]] and [[Lehigh University]]. At exit&nbsp;71, [[Pennsylvania Route 33|PA&nbsp;33]] reaches its southern terminus at a [[trumpet interchange]]. PA&nbsp;33 traverses the [[Pocono Mountains]] as it enters [[Bangor, Pennsylvania|Bangor]] and crosses [[Interstate 80|I-80]]. The final exit on I-78 in Pennsylvania is Morgan Hill Road, which accesses [[Pennsylvania Route 611|PA&nbsp;611]] and [[Easton, Pennsylvania|Easton]]. I-78 then crosses the [[I-78 Toll Bridge]] and enters [[New Jersey]].