Simplify the following text for a Grade 7 native English-speaking person.
Original: The bridge carries part of the A3 road , which is maintained by the Greater London Authority ; the bridge itself is owned and maintained by Bridge House Estates ( see City Bridge Trust ) , an independent charity overseen by the City of London Corporation . The area between London Bridge and Tower Bridge on the south side of the Thames is a business improvement district ( BID ) and is managed by Team London Bridge .
Simplified: The name London Bridge is often mistakenly applied to Tower Bridge , which is the next bridge downstream .