Simplify the following text for a Grade 11 native English-speaking person.
Original: The Tyne and Wear Metro , also known as the Metro , is a light rail system in North East England , serving Newcastle upon Tyne , Gateshead , South Tyneside , North Tyneside and Sunderland .
Simplified: Tyne and Wear Metro is a rapid transit in Newcastle upon Tyne , Gateshead , South Tyneside , North Tyneside and Sunderland in United Kingdom .