Preliminary engineering design review, including independent analysis of bus noise and soundwall design. Reviewed the EIR/EIS and took measurements of tire noise for buses to evaluate the effectiveness of rubberized asphalt.
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Our work ranges from road widenings to interchanges to freeway reconstruction.
Evaluate existing noise impact along highways
Predict highway noise using: Federal Highway Administration Traffic Noise Model (FHWA TNM), Caltrans Noise Prediction Model (SOUND32/SOUND2000)
Detailed community noise surveys
Determine compliance with the procedures and criteria outlined in the Federal Highway Administration Policy and Guidance Manual
Design 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)
Recommend mitigation measures which extend beyond sound barrier walls for projects where right-of-way mitigation must be complemented by retrofitting adjoining structures