Interstate 495 (abbreviated
I-495) is the designation of an
Interstate Highway half-
beltway in
Massachusetts. It was the longest auxiliary Interstate Highway of its kind—measuring 120.74 miles (194.40 kilometers)—until 1996, when the
PA Route 9 section of the
Pennsylvania Turnpike was redesignated as
Interstate 476, making it about longer than I-495. I-495 has its northern terminus at
Interstate 95 in
Salisbury. The highway, forming an arc approximately from
Boston, intersects eight major radial
expressways along its route:
Interstate 93,
U.S. Route 3,
Route 2,
Interstate 290,
Interstate 90 (The Massachusetts Turnpike),
Route 24 and Interstate 95 (twice). It has its southern terminus in
Wareham, where
Interstate 195 and
Route 25 meet. Originally, the stretch from Route 24 to Interstate 195 was signed as Route 25; that status now only begins east of I-195.