Atmospheric Effects Associated With Highway Noise Propagation

Saurenman, Hugh J.; Chambers, Jim; Sutherland, Louis C.; Bronsdon, Robert L.; Forschner, Hans; Arizona. Dept. of Transportation; ATS Consulting, LLC

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Atmospheric Effects Associated With Highway Noise Propagation

2005-10-01
By Saurenman, Hugh J. ; Chambers, Jim ; Sutherland, Louis C. ; ...

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English

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Creators:

Saurenman, Hugh J. ; Chambers, Jim ; Sutherland, Louis C. ; Bronsdon, Robert L. ; Forschner, Hans

Saurenman, Hugh J. ; Chambers, Jim ; Sutherland, Louis C. ; Bronsdon, Robert L. ; Forschner, Hans Less -
Corporate Creators:

Arizona. Dept. of Transportation ; ATS Consulting, LLC

Arizona. Dept. of Transportation ; ATS Consulting, LLC Less -
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

Asphalt Rubber Before And After Studies Computer Models Energy Environment Freeways Friction Course Highways I15: Environment Literature Reviews Measurement Pilot Studies Traffic Noise
Publication/ Report Number:

FHWA-AZ-05-555
Resource Type:

Tech Report
Geographical Coverage:

Arizona ; California ; United States

Arizona ; California ; United States Less -
TRIS Online Accession Number:

01015090
Corporate Publisher:

United States. Federal Highway Administration
Abstract:

The primary questions investigated in this project were: What are the atmospheric conditions in the Phoenix valley that contribute to higher than normal sound levels? Are the conditions unique to the Phoenix valley? Can the atmospheric effects be anticipated? The main components of the project were: (1) a review of literature relevant to sound propagation, (2) detailed noise measurements in a Scottsdale neighborhood along the East Loop 101 Freeway, (3) computer modeling of sound propagation under various measured and inferred atmospheric conditions, (4) noise measurements before and after installation of an asphalt rubber friction course (ARFC) on the Pima Freeway by the Arizona Department of Transportation (ADOT) Quiet Pavement Pilot Program, and (5) a pilot study investigating parametric models of tire/pavement noise. Some key conclusions are: nighttime thermal inversion conditions that are common in the Phoenix valley from October through March cause sound level increases of 5 to 8 dB at distances greater than 1/4 mi from freeways, nighttime down-slope drainage flows off the mountain ranges surrounding the Phoenix valley cause localized focusing and de-focusing of sound levels, sound level variations under inversion conditions appear to be greatest at locations that are upwind relative to the down-slope flows, the highest sound levels during the October to March period will usually occur right around sunrise when high traffic volumes coincide with strong inversion conditions, and installation of the ARFC reduces sound levels by 8 to 10 dBA both close to the roadway and at distances of 1/4 mi and greater. A final tentative conclusion is that, based on the computer modeling, there may be a rapid onset of refraction effects between about 200 and 300 m (650 to 1000 ft) from Phoenix valley roadways.
Format:

PDF
Funding:

T04-58-A0001
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:c93c634e24bbea40b5a6ee0bde81cf25392f2329e5c1542f70de28c24e76e330
Download URL:

https://rosap.ntl.bts.gov/view/dot/40318/dot_40318_DS1.pdf
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Atmospheric Effects Associated With Highway Noise Propagation

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