State Route 227 and Los Ranchos Road Intersection Operational Improvements Project

Project Status

October 12, 2021 - Virtual Public Meeting on DRAFT 2021 Corridor Traffic Study. 

September 29, 2021 – Draft 2021 Corridor Traffic Study completed

May-June 2021 – Consultant continues efforts on traffic analysis and County is on schedule to present the findings to the community this fall/winter. Conducted public outreach ahead of the DRAFT 2021 State Route 227 Corridor Traffic Study via six focus groups, which included stakeholders that work in emergency response, air quality, agriculture, business, tourism, biking, Los Ranchos Elementary, and affected neighborhoods.

July 14, 2020 - The topographic survey, geotechnical explorations, and traffic forecasting is complete. Work continues to analyze each corridor alternatives under current and future traffic volumes. The County hopes to present the findings of the traffic analysis to the community this fall/winter 2021.

November 19, 2019 - The San Obispo County Board of Supervisors approved Phase 1 of a professional consultant services contract with Rick Engineering Company. 

March 20, 2019 - The first townhall meeting was held at Los Ranchos Elementary School. Representatives from the County, Caltrans, and San Luis Obispo Council of Governments (SLOCOG) were present to inform the public about the proposed project and listen to comments and concerns.

Project Timeline


Project Funding

The Project is funded through federal Congestion Mitigation Air Quality (CMAQ) program funds and State Highway Account (SHA) funds programmed through the San Luis Obispo Council of Governments (SLOCOG).

2021 Corridor Traffic Study & Public Meeting

As part of the preliminary engineering phase of this project, the study team commissioned a detailed traffic analysis of the State Route 227 corridor from Aero Drive to Price Canyon Road to assess the congestion and safety benefits of various project alternatives at high priority intersections, including: Farmhouse Lane, Buckley Road, Crestmont Drive, Los Ranchos Road, and Biddle Ranch Road. 


Please join us for a public meeting to learn more about this study!

Virtual Public Meeting: 2021 Corridor Traffic Study Findings with Q&A

October 12, 2021, 6:00-8:00pm


Questions about the meeting? Contact SLOCOG Public Information Officer Anna Devers at [email protected] or (805) 781-4462.

See SLOCOG's YouTube channel for a number of simulated videos.


Project Background

In 2015, the San Luis Obispo Council of Governments (SLOCOG) initiated a corridor study to develop solutions to growing congestion on State Route 227 between Tank Farm Road and Price Canyon Road. The study included analysis of the following two possible solutions for the corridor:

1. Widening of State Route 227 to 2-lanes in each direction and upgrading the signals at various intersections

2. Constructing a series of roundabouts at key intersections

SLOCOG held three workshops during the development of the study to gain input from the public regarding the two alternatives. To improve operations by relieving existing and future congestion, the study recommended constructing a series of roundabouts, starting with Los Ranchos Road as a priority project, followed by Buckley Road. 

The SLOCOG Board approved the operations study and technical appendices in January of 2017. 

November 19, 2015 - SLOCOG Public Workshop #1

May 24, 2016 - SLOCOG Public Workshop #2

September 15, 2016 - SLOCOG Public Workshop #3

January 17,2017 – SLOCOG’s State Route 227 Operations Study was adopted. For details, see the Project Background section below.

Questions for SLOCOG? Contact SLOCOG Public Information Officer Anna Devers at [email protected] or (805) 781-4462


Project Contacts

For questions please contact Genaro Diaz via phone, email, or web-form.

Email: [email protected]

Phone: (805) 781-5279

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Frequently Asked Questions

Contact Public Works via web form, email, or call us at (805) 781-5252.