Trolleybuses in Teesside the buses, which were held up by wartime shortages. In December 1918, the company was sold, / to Middlesbrough Corporation and / to Eston Urban District Council. They formed the Tees-side Railless Traction Board. The first trial run was on 19 September 1919. Official opening was at 11am on Saturday 8 November 1919, with Chairman of the Board, Cllr. W.G.Grace, driving the first bus. On 1 April 1968, the Board merged with Middlesbrough and Stockton to form Teesside Municipal Transport and trolley buses were replaced with diesel buses 3 years later. The original routes were Smeaton St - North Ormesby
County Borough of Teesside of the proposed county of Cleveland were considerably altered, with a number of marginal areas removed. Under the revised scheme, the Teesside district would have 70 percent of the county's population, and it was felt that it would dominate the county. Accordingly, new guidelines were issued to the Local Boundaries Commission in March 1972 that was charged with drawing up district boundaries: Cleveland ""should be divided into not less than four new districts with populations comparable as is reasonably practicable having regard in particular to the pattern of local government before the establishment of the Teesside county borough"". The county