Traffic pollution tested across Sheffield
The level of air pollution caused by vehicles across Sheffield is being monitored at sites across the city.
Recording equipment will measure exhaust pipe emissions of vehicles travelling through the sites.
Levels of nitrogen dioxide and fine dust particles emitted will be analysed.
The council said poor air quality resulted in about 500 early deaths a year and cost the city's economy £160m annually.
Councillor Jack Scott, who has responsibility for the environment in the city, said: "We know that air pollution impacts badly on Sheffield people's health and the economy and contributes to climate change.
"Each year, the impact of air quality on health costs the Sheffield economy £160m and results in up to 500 early deaths.
"We know one of the reasons for this is traffic.
"We know in theory the amount of harmful gases vehicles produce as told to us by manufacturers - but we have never tested the levels throughout the city."
The devices will be placed at Western Bank, Eyre Street, Prince of Wales Road, Attercliffe Centre, Asline Road and Broad Lane.