TNM Noise Analysis of Central H-1 Freeway

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.

  • Corporate Authors:

    University of Hawaii, Manoa

    Department of Civil and Environmental Engineering
    2540 Dole Street, Holmes Hall 383
    Honolulu, HI  United States  96822

    Hawaii Department of Transportation

    Highways Division, 869 Punchbowl Street
    Honolulu, HI  United States  96813

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Prevedouros, Panos D
    • Shi, Liang
    • Martin, Wiemarlyn
  • Publication Date: 2014-4-4


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Maps; Photos; Tables;
  • Pagination: 76p

Subject/Index Terms

Filing Info

  • Accession Number: 01743414
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/HI-14/HWY-L--2006-01
  • Created Date: Jun 16 2020 2:57PM