| Report No. | AZN3 (jot this number down to order) |
| Title | A Comparison of Traffic Noise From Asphalt Rubber Asphalt Concrete Friction Courses (ARACFC) and Portland Cement Concrete Pavements (PCCP) |
| Authors | Henderson, Michael P. & Kalevela, Sylvester A., JHK & Associates |
| Publisher | Arizona DOT |
| Pub. Date | February, 1996 |
| Pages | 168 pages |
| Keywords | noise, traffic noise, pavements noise, tire-pavement noise, asphalt rubber, noise measurement, portland cement concrete |
| Description | A study was conducted by the Arizona DOT to evaluate the potential poise reduction benefits of using Asphalt Rubber Asphalt Concrete Friction Course (ARACFC) as an overlay for Portland Cement Concrete Pavements (PCCP). Comparative noise measurements were performed to compare the frequency content of the noise generated by the two pavement types. Two separate measurement techniques were used to collect noise data. First, roadside traffic noise measurements were performed on adjoining freeway segments that consisted of different pavement types. For these measurements, two noise meters were positioned at equal distances from the adjoining freeway segments, and roadside traffic noise levels were measured simultaneously. The second measurement technique consisted of on-road tire-pavement noise measurements. For these measurements, a specially made bracket was clamped to the frame of a test vehicle, and a noise meter microphone was secured near the tire-pavement contact area. Noise readings were recorded as the test vehicle traveled at highway speeds over various pavement surfaces. Noise frequency data was collected using both measurement techniques. Then noise data collected for the study demonstrated that the ARACFC freeway segments produced lower noise levels than the PCCP freeway segments. The extent of the noise difference observed between the two surface types depended on the specific freeway segments being compared. In some cases, the noise level differences would be distinguishable by human perception (differences of 3 decibels or greater). In other cases, the differences would not by noticeable. The frequency data collected for the study also indicated that the ARACFC surfaces generated less high frequency noise than the PCCP surfaces. |
| Postage | $ 12.00 : U.S. $ 12.40 : Canada/Mexico $ 12.80 : Rest of the World |
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