Interstate 78 (I-78) is an east–west Interstate Highway in the Northeastern United States that runs 144 miles (232 km) from I-81 northeast of Harrisburg, Pennsylvania through Allentown to western and North Jersey, terminating at the Holland Tunnel entrance to Lower Manhattan in New York City. Major metropolitan areas along I-78 include the Lehigh Valley in Pennsylvania, the Gateway Region in New Jersey, and the New York metropolitan area.
The I-78 interchange approaching I-81 north in Union Township, Pennsylvania
I-78 westbound past the PA 412 interchange in Bethlehem in the Lehigh Valley
I-78 westbound in Warren Township, New Jersey
I-78 eastbound crossing Newark Bay at Newark Bay Bridge
Interstate 81 (I-81) is a north–south Interstate Highway in the eastern part of the United States. Its southern terminus is at I-40 in Dandridge, Tennessee; its northern terminus is on Wellesley Island, New York at the Canadian border, where the Thousand Islands Bridge connects it to Highway 137 and ultimately to Highway 401, the main Ontario freeway connecting Detroit via Toronto to Montreal. The major metropolitan areas along the route of I-81 include the Tri-Cities of Tennessee; Roanoke in Virginia; Harrisburg and the Wyoming Valley in Pennsylvania; and Syracuse in New York.
I-81 looking southbound near milepost 245 in Harrisonburg, Virginia
Northbound on I-81 just after entering West Virginia
View north along I-81 just north of exit 5 at Halfway Boulevard in Halfway, Maryland
I-81 northbound at western terminus of I-78 in Lebanon County, Pennsylvania