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Update on Results of Long-term Traffic Noise Measurements for Pavement Overlay Projects

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

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Update on Results of Long-term Traffic Noise Measurements for Pavement Overlay Projects

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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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