Title
Florida Noise Barrier Evaluation And Computer Model Validation
Abstract
The results of a project that investigated the effectiveness of in situ noise barriers in Florida are presented. The prediction accuracy of the FHWA Traffic Noise Model (TNM) is compared with STAMINA 2.0 and 2.1 (Florida-specific). A total of 20 barrier sites were visited during a 3-year period that resulted in 844 discrete 20-min equivalent sound level (L eq) measurements behind the barriers. Barrier insertion loss was determined using the ANSI indirect barrier method. A methodology was developed to estimate shadow zone length created behind highway noise barriers. All of the barriers tested were effective (>5 dB:LAeq insertion loss at distances equivalent to the first row of homes, where LAeq is the A-weighted Leq) except one site because of marginal additional shielding from a berm-barrier combination. Only three sites had an insertion loss of less than 5 dB at distances representative of the second row of homes. Overall, measurements indicate that the barriers provide substantial sound level reduction for residents along the highway. TNM was the best prediction model when considering all test sites; however, the STAMINA models were more accurate at predicting source level. TNM predictions using the Average pavement input overpredicted the reference sound levels measured at these sites. TNM predictions using the OGAC (open-graded asphalt concrete) input were improved (under 2 dB:LAeq of error) over those using the Average pavement type input. This result is expected because Florida uses an open-graded asphalt friction mix.
Publication Date
1-1-2003
Publication Title
Transportation Research Record
Issue
1859
Number of Pages
72-78
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.3141/1859-09
Copyright Status
Unknown
Socpus ID
2142715332 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/2142715332
STARS Citation
Wayson, Roger; MacDonald, John; and El-Assar, Ahmed, "Florida Noise Barrier Evaluation And Computer Model Validation" (2003). Scopus Export 2000s. 2032.
https://stars.library.ucf.edu/scopus2000/2032