Improved definition (EN only): Environmental noise by road traffic. Typically a combination of 'rolling noise' caused by the interaction between the vehicle tyre and the road surface tyres on the road surface, and engine 'propulsion' noise.

environmental noise generated from vehicles using roads and highways caused by rolling and propulsion

based on ‘Noise in Europe 2014’, EEA Report, EU, No 10/2014, http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwiCq5ecpdfLAhUBtxoKHcQtBD8QFgglMAE&url=http%3A%2F%2Fwww.eea.europa.eu%2Fpublications%2Fnoise-in-europe-2014%2Fdownload&usg=AFQjCNFL6slPLcU5aZxH4lb58c9jg31jjA&sig2=vPWm08cxL07xo3-4VBitEQ&bvm=bv.117218890,d.d2s [23/03/2016] AND http://www.epd.gov.hk/eia/register/report/eiareport/eia_0592001/3-06.pdf

road traffic noise