Avila Beach Drive Roundabout

County of San Luis Obispo
Avila Beach Drive at US 101, California

Project Summary

The Avila Beach Drive at US 101 Operational Improvement (Roundabout) Project was designed to replace an existing two-way stop controlled US Highway 101 southbound ramp intersection at Avila Beach Drive/Shell Beach Road.

The project incorporated:

  • Single-lane roundabout at the off-ramp
  • Park and ride lot and transit stops to serve the Regional Transit Authority (RTA) and Avila Trolley
  • Traffic calming features
  • Improvements to multimodal access and safety

Construction Phase

Earth Systems’ scope included:

  • Soils and materials quality assurance testing for roadway excavations
  • Trench backfill
  • Structure backfill
  • Hot mix asphalt
  • Concrete
  • Shotcrete
  • Rebar
  • Testing associated with modifications of the existing water distribution line

Associated Improvements

  • Numerous soil nail and other types of retaining structures ranging from 3 feet to approximately 22 feet in height
  • Lighting infrastructure
  • Stormwater control features
  • Relocation of existing water distribution line
10 Drilling Close Up
2 Materials and Machinery
6 Dirt and Machinery Close Up
7 Drilling
6 Median View
7 Cars and Roundabout Center
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3 Poppies and Roundabout