sentences:  In 1973, I-40 and the Durham Freeway (future NC 147) were connected, in the RTP.In 1974, a gap was completed between US 276, in Cove Creek, to the freeway connector (future Great Smoky Mountains Expressway), near Clyde.I-40 also extended east from Porters Cove Road, in Oteen, to Patton Cove Road (SR 2740), in Swannanoa.