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 EfW Cleveland. In December 2006, SITA UK signed a 28-year private finance initiative contract worth £70 million with Northumberland County Council, to provide them with waste management services and to reduce the county's reliance upon landfill. This included the construction of an extra incineration line at the Teesside plant. Civil construction of the extension began in April 2007, with heavy erection beginning that November. Von Roll was the general contractor for the entire extension. In May 2009, the third line, which cost £70 million to build, was brought into operation. It was officially opened on 8 October 2009 by former MP