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Santiago Canyon Road Safety Improvements Project

Based on traffic accident data along Santiago Canyon Road and field evaluations by traffic engineering experts, OC Public Works has been working on a series of various safety measures to enhance the safety for drivers, cyclists, pedestrians and others.

In August 2020, OC Public Works will start construction activities for the Santiago Canyon Road Safety Improvements Project, which includes various roadway measures designed to improve safety for road users, enhance driver awareness and reduce the likelihood of vehicular accidents.

arial photo

Phase 1: Completed

  • Changeable message signs featuring safety information and reminders
  • Solar-powered permanent speed feedback signs to alert drivers of their speed


Click here to view [Phase 1] map of improvement locations

Upcoming Safety Improvements

August 2020 – June 2021

Safety measures being implemented include:

  • Install high-friction road surface treatment
  • Upgrading roadway caution signs (curve ahead, no passing and others)
  • Upgrading guardrails and reflectors
  • Enhancing bike lane buffer area
  • Installing rumble strips along the center of the road
  • Continue coordination between OC Public Works and law enforcement

Detailed Map: Safety Measure Locations 

rumble strips
Example image of Rumble Strips.

Project Timeline


Project Events

Virtual Community Meeting

Date:  Wednesday, July 29, 2020  |  6:00 pm – 7:00 pm

Meeting topics:

  • Project Purpose & Need
  • Project Process & Anticipated Timeline
  • Project Information
  • Construction Activities
  • Questions & Answers Session

Meeting Presentation:

Future Project:  Phase 3 Improvements – Passing Lanes Project

(Master Plan of Arterial Highways Amendment):

Anticipated Phase 3 Schedule:

  • 2019: Pre-Design
  • 2020: Final design, utility coordination and environmental clearances
  • 2021 / 2022: Procurement of materials and resources and permitting
  • 2023 / 2024: Construction of improvements

Click here to view  [Phase 3] map of improvement locations.


To share your comments, questions or suggestions, please contact us:


  phone  (714) 667-9759