A practical method of predicting noise produced by road traffic controlled by traffic signals

A new expression of the probability density function for periodic nonstationary noise level fluctuation is first derived in a case where the road traffic flow is controlled by traffic signals. Next, a new practical procedure for estimating and/or predicting the probability distribution form of road traffic noise, on the basis of the simplified time patterns of the statistics on the noise level or number of moving vehicles, is proposed as an application of the above theory. By using the actual road traffic noise data observed in Hiroshima City, it was experimentally confirmed that the theoretical method was valid and effective as a prediction technique.