High Quality Content by WIKIPEDIA articles! 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 11 miles (18 km) longer than I-495. I-495 has its northern terminus at Interstate 95 in Salisbury. The highway, forming an arc approximately 30 miles (48 km) 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 south of I-195.