sentences:  I-40 received two extension approvals; the first in 1969 to Interstate 95 (I-95), to be routed in or near Smithfield, and the second in 1984 to Wilmington.After 34 years since it first opened, the last section completed was the Winston-Salem Bypass in 1992.The highest point is at , located at Swannanoa Gap, and the lowest point is at , located at the Pender–New Hanover county line.