Teesside is an unusual Primary Destination in that it refers to a conurbation rather than a single settlement. It is used at a distance rather than the Primary Destinations of Middlesbrough and Stockton-on-Tees, and is based on the former County Borough of the same name.
Stage 1: Portrack Interchange, Haverton Hill Road, south of Billingham to A174Parkway Junction, south of Thornaby-on-Tees. The dual carriageway was opened in 1975 per the National Audit Office report of 2018. It included the 6,350 foot River Tees Viaduct. Hansard of 16 June 1975 suggested that Tees Viaduct would open with 2 way running on the northbound carriageway, pending full completion in the new year. Contractor was Cementation Construction Ltd.
Stage 2: The 6.8 mile D2 dual carriageway from A174Parkway Junction, south of Thornaby-on-Tees to one mile south of Crathorne was completed in October 1976 per the Policy for Roads: England 1978 Report. The Craythorne bypass may have opened earlier. It included the 1,130 foot Leven Valley Viaduct. The opening had been delayed due to adverse ground conditions with the Leven Viaduct construction. Outturn works cost £9.6 million.