Analysis of Traffic noise of various transverse rumble strips' geometry

The main purpose of transverse rumble strips (TRS) is to warn drivers by generating noise and vibration at close intersections or stop zone. TRS has been approved to be effective in reducing traffic accident due to sleeping from previous research. However, the external traffic noise creates complains from resident nearby the highway. The object of this paper is to investigate an external traffic noise of TRS as changed geometry design. TRS is common used by the agency for the purpose road safety on highway in Korea. As expand the urban and increase population, the resident area is getting closed a highway. Thus, the complains of the external traffic noise by generated TRS is more frequent. In order to investigate an effect of TRS geometry for the traffic noise, this study conducted the measurement of traffic noise as function of various width and depth of TRS. The vehicle speed was a factor to measure the traffic noise. The range of speed was from 60km/h to 100km/h. The wide width of transverse rumble strips was about 6dB(A) greater than the noise from the narrow width of TRS.