A road traffic map of London designed to help reduce noise levels has been launched.
Teams studied noise made from engines, tyres and car stereos
The government commissioned the map in a bid to meet strict European Union targets on noise pollution.
The report could lead to more speed restrictions and quieter road surfaces, as used on motorways.
A team from the Department for Environment, food and Rural Affairs
(Defra) studied noise made from engines, tyres and car stereos.
It is hoped the map will be used in traffic planning and for planning buildings and developments.
Councils can also use the map to look at road closures, traffic calming measures in residential areas and places where newer, quieter surfaces would be the solution.