Rockridge Soundwalls

State Route 24 Oakland, CA Pre-NBSSR Noise Study: Summary

- The Study's justification for the construction of the two soundwalls that are highest on the Caldecott Tunnel Settlement Agreement Final Project List is questionable.

- Along Highway 24 through Rockridge, measured noise levels are mostly below the required threshold. The only two places where measured noise exceeded this threshold are north of Highway 24 near Claremont Middle School and around Hardy Park.

- Predicted noise levels which were above this threshold were calculated using invalid assumptions.