Road traffic noise from a stopping line

A simple method, requiring simultaneous noise measurements
at three positions is presented for the prediction of the equivalent continuous
sound level, LAeqT, of road traffic noise generated at the stopping line.
Geometrical spreading of noise is affected by reflection from the hard ground
surface. This method can be applied when noise is produced by vehicles of one
category, the traffic streams in both directions are almost identical, and the
perpendicular distance between the road axis and the receiver exceeds the road
width.