Long‐term Noise Performance of Long term Noise Performance of OGAC – Results of 10‐year long study Interstate 80 – East of Davis, California Dana M. Lodico Lodico Acoustics LLC TRB ADC 40 Transportation‐Related Noise & Vibration Meeting James A. Reyff Illingworth & Rodkin, Inc Bruce Rymer Vibration Meeting Dayton, OH July 26‐29, 2009 Bruce Rymer California Department of Transportation
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Long‐term Noise Performance ofLong term Noise Performance of OGAC – Results of 10‐year long study
Interstate 80 – East of Davis, California
Dana M. LodicoLodico Acoustics LLC
TRB ADC 40
Transportation‐Related Noise & Vibration Meeting
James A. ReyffIllingworth & Rodkin, Inc
Bruce Rymer
Vibration Meeting
Dayton, OH
July 26‐29, 2009
Bruce RymerCalifornia Department of Transportation
Overview
• Interstate 80, East of Davis, California– Traffic: ~146,000 ADT, ~10% Trucks (2006)– Geometry: six lane divided freeway, no notable grade or cross slope
– Area: undeveloped agricultural land
• Timeline– Originally aged DGACOriginally aged DGAC– OGAC overlay placed in 1998– Measurements made 1998‐2008 (ongoing)
• Funded by California Department of Transportation (Caltrans)
OGAC overlay just after application (August 1998) and three times per year (summer winter andand three times per year (summer, winter, and spring) during aging process (1998‐2008)
OGAC OverlayAged DGAC
Measurements
• Continuous Time Integrated Method (CTIM)– Measures traffic and community noise
– Conducted prior to overlay, just after, and 3 times per year (spring, summer, winter) following application
– More than 275 hours of data (> 70 days over 10 years, 1998‐2008)