The measurement of road traffic noise can be carried out with reference to the relevant requirements in GB/T3222-1994 "Acoustic Environmental Noise Measurement Method" and GB3096-93 "Urban Area Environmental Noise Standard".

The measuring instrument is an integral sound level meter with an accuracy of type 2 or above, and its performance meets the requirements of GB3785.

1. The measurement should be carried out under weather conditions with no rain or snow, and the measurement should be stopped when the wind speed reaches more than 5m/s. The microphone is equipped with a windshield during measurement.

2. Select a certain traffic trunk line as the measurement section, and select the measurement point on the sidewalk between the two intersections, 20cm away from the curb of the roadway;

The distance between here and the intersection should be greater than 50m. Arrange 5 measuring points on the measuring road section and draw the measuring point layout diagram.

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3. Use a sound level calibrator to calibrate the measuring instrument, and the deviation should not be greater than 0.5dB.

4. Conduct traffic noise measurements continuously for 20 minutes, and use two counters to record the number of large vehicles and small vehicles respectively.

5. Repeat the above measurements at 5 different measuring points on the same road section.