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Long-term Traffic Noise Measurements for Pavement Overlay Projects Study Results

This report summarizes the findings from long-term traffic noise measurements for pavement overlay projects, including the impact of various pavement types on noise levels. The study focuses on locations such as I-80 near Davis, State Route 138 in Los Angeles County, and ADOT pilot studies. Results show the effects of different pavement materials on sound intensity, frequency spectra, and calculated reductions from baseline levels. Additionally, the study examines the noise performance of pavements in Arizona and California, including the effects of noise barriers. The findings offer insights into the effectiveness of Quiet Pavement Programs in reducing traffic noise pollution.

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Long-term Traffic Noise Measurements for Pavement Overlay Projects Study Results

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  1. Update on Results of Long-term Traffic Noise Measurements for Pavement Overlay Projects James A. Reyff Illingworth & Rodkin, Inc. 2006 Summer Meeting TRB ACD40 Williamsburg, VA

  2. Study Results Summarized • I-80 Davis OGAC – 8 years • State Route 138, Los Angeles County – 3+ years • ADOT Pilot Studies – 2+ years

  3. I-80 Pavement Project Location: I-80 just east of Davis and west of Sacramento, CA Traffic: 1998 - 120,000 ADT (almost 10% trucks) 2004 - 135,000 ADT • Existing - Aged AC surfacing • DGAC (60mm) applied in June 1998 • OGAC (25 mm) applied in July 1998

  4. I-80 Environment

  5. Existing AC Pavement

  6. 6 Year Old OGAC

  7. I-80 Davis 8yr Findings

  8. I-80 Davis 7yr FindingsSeasonal Effect

  9. I-80 Davis 8yr FindingsCalculated Reduction from Baseline

  10. I-80 Davis 8yr FindingsTire/Pavement Sound Intensity

  11. Frequency Spectra – 20m Baseline 7 Year

  12. Frequency Spectra – 145m DOWNWIND Baseline 8 Year UPWIND 8 Year Baseline

  13. LA 138 Pavement Research • Research Site est. 2002 • Two Measurement Techniques • Statistical Passby • Onboard Tire/Pavement Sound Intensity • 5 Pavements types • DGAC • Thick OGAC (75mm) • Thin OGAC (30mm) • RAC • BWC

  14. LA 138 Results • Initial results documented by Volpe and Caltrans (Illingworth & Rodkin) • Initial levels up to 4 dBA lower than DGAC with Thick OGAC and RAC quietest • Regular testing of Tire/pavement sound intensity – spring and fall

  15. LA 138 Results

  16. LA 138 Results SI Level – Eastbound SR 138

  17. Results of the Arizona Quiet Pavement Program – Sites 3D and 3E

  18. Site 3D – AZ Route 202 Random Transverse Tined PCC ARFC

  19. Site 3D Measurements 50ft x 12ft & 5ft 250ft x 5ft 100ft x 5ft

  20. Site 3D Results – Leq

  21. 3D Results – Normalized for Traffic

  22. 3D Results – Leq Data

  23. Site 3E – AZ Route 101 Uniform Transverse Tined PCC ARFC

  24. Site 3E – Measurements 50ft x 12ft & 5ft 100ft x 5ft 100ft x 5ft

  25. Site 3E Results – Leq

  26. 3E Results – Normalized for Traffic

  27. 3E Results – Leq Data

  28. Sound Level vs. DistanceMeasured PCC and ARFC

  29. Sound Level vs. DistanceMeasured and Modeled

  30. Site 3D Measurements 50ft x 12ft & 5ft 250ft x 5ft 100ft x 5ft

  31. Equivalent Noise Barrier Performance

  32. I-280 San Mateo • Existing PCC surface • PCC and Rubberized Open Grade • Onboard Tire/Pavement Sound Intensity

  33. Initial Results for I-280

  34. Results for I-280 after 3 yrs RAC (O)

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