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
Teesside University merger with Teesside College of Education took place in the 1970s along with the purchase of Flatts Lane. The Clarendon Building was added in 1973, as was the Stephenson Building in 1976. Both of these buildings remained in use for the Polytechnic's long-awaited conversion into a university. That happened on 16 June 1992, when Teesside Polytechnic became the University of Teesside, one of the UK's first new universities following that year's Further and Higher Education Act. By the 1990s, the institution had almost 8,000 students. In 1997 the old Polytechnic's library was replaced with a Learning Resource Centre. Subsequent additions