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  • Evaluating existing noise impact along highways
  • Predicting highway noise using: Federal Highway Administration Traffic Noise Model (FHWA TNM), Caltrans Noise Prediction Model (SOUND32/SOUND2000)
  • Detailed community noise surveys
  • Determining compliance with the procedures and criteria outlined in the Federal Highway Administration Policy and Guidance Manual
  • Designing sound walls in conformance with Chapter 1100 of Caltrans Highway Design Manual, following the Traffic Noise Analysis Protocols (TNAP) established by the Technical Noise Supplements (TeNS)
  • Recommendations for mitigation measures which extend beyond sound barrier walls for projects where right-of-way mitigation must be complemented by retrofitting adjoining structures

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