The 3.5-mile Easington and Cold Hesledon Diversion opened in the early 1970s, initially designated as the A19(M). There is an access road to the south from Easington and the A1086 (for Peterlee and Hartlepool) has limited access to the northbound and from the southbound routes. There is an intersection for the A182 (for Hetton-le-Hole), and limited access from the B1283 (for Easington Village), with no access from the southbound route. The former route north of Easington is the B1432 (to the east). At Cold Hesledon, there is an intersection for the A182 (to Seaham, to the east) and the B1285 (for Murton, to the west). The three-mile New Seaham and Seaton Diversion opened in the early 1970s, with the former route now the B1285 through Dalton-le-Dale. The eight miles of sections from Easington to Seaham were built by A. R. Carmichael in late 1971, and made the A19 from Thirsk to Sunderland completely dual-carriageway, with the contract awarded in October 1969. At Seaton with Slingley, there is a limited-access (to and from the south) intersection for the A1018, for Sunderland and Ryhope. At the same point there is a limited-access intersection (to and from the north) for the B1404 for Seaton and Houghton-le-Spring. The former route through the south of Sunderland is now the B1522. At the point where a former railway crosses (now NCN Route 1) the road enters the City of Sunderland.