Select Projects

1-880 North Safety Improvements

, CA

Computer models of future traffic/lane alignment, identification of noise sensitive receivers (including a nearby elementary school), as well as potential construction noise.

SR 84 Expressway

Livermore, CA

Long-term noise surveys, noise modeling of existing roadway/proposed alternatives, traffic noise impacts on residences, and effectiveness of existing topography and noise barriers.

Doyle Drive Reconstruction

Presidio, San Francisco

Groundborne vibration analysis and measurements during reconstruction. Measurements were made of the existing vibration levels near historic buildings adjacent to the project.

Sister Cities Blvd. Noise Study

South San Francisco

Sound measurements, traffic noise modeling and analysis to determine the need for a westward extension of the existing sound wall.

Crow Canyon Road Sound Wall

Danville, CA

Noise measurements, traffic counts and SoundPlan™ noise model to determine construction noise levels. Compared levels with project criteria and developed funding priorities.

SR 24 Caldecott Tunnel Construction

Oakland, CA

Assisted with noise survey coordination and report preparation for a study of traffic noise along between SR13 and I-580 and determined potential sound wall locations.

Embarcadero Central Freeway Reconstruction

San Francisco

Noise impact alternatives analysis including noise survey and computer modeling with Caltrans SOUND32 Noise Prediction Model. Evaluation and analysis of Caltrans EA/FONSI.

I-238 Reconstruction Noise Study

San Lorenzo, CA

For BART Dublin-Pleasanton extension: identified BART and highway noise impacts using Caltrans criteria. Designed sound wall using SOUND32 Noise Prediction Model.

SR 92/I-880 Interchange DEIS/DEIR

Hayward, CA

Environmental noise study for highway noise predictions using the Caltrans SOUND32 with TrafficNoiseCAD7. Recommended sound wall designs to comply with Caltrans guidelines.

SR 242 Noise Impact Evaluation

Concord, CA

Noise measurements and identification of noise impacts using Caltrans criteria. Design of 8,600 feet of sound wall using SOUND32 Noise Prediction Model interfaced to a digitizer.

San Fernando Valley BRT

Los Angeles

Preliminary engineering design review, including independent analysis of bus noise and soundwall design. Also reviewed the EIR/EIS analyses.

Contact Any of Us About Your Project

Deborah Jue
Deborah Jue
Tim Johnson
Tim Johnson
Pablo Daroux
Pablo Daroux

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