County Borough of Teesside councils in 1918, and was a pioneer operator of electric trolleybuses. The three undertakings adopted a common livery of turquoise and cream in 1967 in preparation for their amalgamation. On 1 April 1968 the combined fleet became Teesside Municipal Transport. Teesside initially operated a mixed fleet of trolleybuses and omnibuses, but on 4 April 1971 trolleybus operation ended. A formal closure ceremony was held two weeks later. Before 1968 the Teesside area was served by three police forces: Middlesbrough Borough Police, Durham Constabulary and the North Riding of Yorkshire Constabulary. It was originally envisaged that the new county borough would
Trolleybuses in Teesside of the former Teesside system trolleybuses are now preserved, one of them at Black Country Living Museum, Dudley, West Midlands, one at the Kirkleatham Old Hall Museum, and the third one near the Trolleybus Museum at Sandtoft, Lincolnshire. From 1912 Bolckow Vaughan was the main mover behind the North Ormesby, South Bank, Normanby and Grangetown Railless Traction Co., which built a depot at Cargo Fleet, took power (until 1955) from the Bolckow Vaughan's (later Dorman Long) South Bank steel works, erected the first pole at Normanby in July 1915 and had the entire system ready 8 months later, but not