Teesside mainly associated with the local petrochemical, chemical and steel processing industries. The port is an important piece of logistical infrastructure for the NEPIC cluster of process companies. Teesside continues to be used locally to refer the entire urban area and the name can still be seen in the following uses: It has also been adopted for various other purposes as a synonym for the former county of Cleveland. It is common to see Teesside spelled incorrectly as "Teeside", with a single 's'. Teesside Teesside () is the conurbation in the north east of England around the urban centre of Middlesbrough
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