Past Teesside the A19 enters rural landscape, meeting the former route through Billingham, where it enters the borough of Hartlepool. There is a right turn for Dalton Piercy at the Windmill Motel, and two link roads into Elwick, to the east. At Sheraton with Hulam, there is an intersection for the B1280 (for Wingate to the west), and the A179 (for Hartlepool, to the east). At this intersection the road enters County Durham. The route over Sedgewick Hill has been improved to the east. There is staggered crossroads, for Hutton Henry, to the left. There used to be a right turn for Castle Eden, now accessible only from the southbound carriageway. North of here, the Castle Eden Diversion opened in the early 1970s. It crosses a former railway (now NCN 1 and 14), and meets the A181 (for Wheatley Hill and Durham), and the B1281 (for Hesleden) at an intersection, and passes west of Shotton, where it joins the former route. There is a large intersection at "Burnhope Way Roundabout" for Shotton Colliery and a large industrial estate, to the west, and the B1320 for the new town of Peterlee, to the east.