TNM Noise Analysis of Central H-1 Freeway

Details

• Creators:
  Prevedouros, P. D. ; Shi, Liang ; Martin, Wiemarlyn
• Corporate Creators:
  University of Hawaii at Manoa. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Hawaii. Dept. of Transportation. Highways Division ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Analysis Freeways Noise Barriers Sound Level TNM Traffic Noise
• Publication/ Report Number:
  FHWA/HI-14/HWY-L--2006-01
• Resource Type:
  Tech Report
• Geographical Coverage:
  Hawaii ; United States
• Edition:
  6/11 to 3/14
• Corporate Publisher:
  Hawaii. Dept. of Transportation
• Abstract:
  The purpose of this project was to provide a comprehensive first-time assessment of noise levels along the central part of the H-1 Freeway. The noise analysis tool used was FHWA’s Traffic Noise Model (TNM, version 2.5). Analyses of both existing (year 2012) conditions and with a 10 ft. noise barrier were conducted for three time periods: 6:00-7:00 AM was selected to represent worse noise conditions during the AM peak period; 5:00-6:00 PM was selected to represent worse noise conditions during the PM peak period; and 7:00-8:00 PM was selected to represent worse night time noise conditions. The latter period has relatively high volumes and high speeds. After 8 PM speeds are high but volume becomes low, thus estimates of noise are lower in magnitude. The 7-8 PM hour is the preferred period for assessing annoyance from highway noise along this corridor. Results: 17% of the segments or 1.08 out of 7.66 miles of central H-1 Freeway examined in this analysis have traffic noise levels below the FHWA Noise Abatement Criteria (NAC), that is, below the level that requires noise abatement; 48% or 3.83 miles have a noise level above the NAC that can be mitigated using 10 ft. noise barriers; 31% or 2.44 miles have a noise level above the NAC that cannot be mitigated using 10 ft. noise barriers because the receptors are located at an elevation over 10 ft. above the roadway; and, 3% or 0.32 miles have a major traffic noise problem that would require tall barriers (well over 10 ft.) to mitigate. In mid-2014 a large portion of the subject freeway from Middle St. to Punahou St. was widened from 3 to 4 lanes per direction rendering most of the results herein approximate, at best.
• Format:
  PDF
• Funding:
  55145
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:59c439a347cae48f69e924e23134e63110777f819e1382983bdf8b55f500efda
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/53611/dot_53611_DS1.pdf
• File Type:
  [PDF - 3.25 MB ]