California Department of Transportation

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Comment Period Closed as of 5 pm, January 22, 2016.



State Route 55 (I-405 to I-5) Improvement Project


The California Department of Transportation (Caltrans) District 12, in cooperation with the Orange County Transportation Authority (OCTA), proposes to widen State Route 55 (SR-55) in both directions from just north of the Interstate 405 (I-405)/SR-55 Interchange to just south of the Interstate 5 (I-5)/SR-55 Interchange between Post Miles 6.4 and 10.3, traversing the cities of Santa Ana, Tustin, and Irvine in Orange County, California. The project purpose is to reduce traffic congestion and improve mobility and traffic operations in the project study area. The project is currently in the environmental phase..

Anticipated Schedule:
PA&ED – Present until Summer 2016
Design – Winter 2016 to Spring 2019
Construction – Construction Summer 2019

Public Notice - Announcement of Public Review Period Extension

Public Notice

Draft Initial Study with Proposed Mitigated Negative Declaration/Environmental Assessment

Cover page/General Information/Title Page
Proposed Mitigated Negative Declaration
Table of Contents

Chapter 1 – Proposed Project
Chapter 2 - Affected Environment, Environmental Consequences, and Avoidance,
Minimization, and/or Mitigation Measures
2.1 Land Use
2.2 Growth
2.3 Community Impacts
2.4 Utilities and Emergency Services
2.5 Traffic and Transportation/Pedestrian and Bicycle Facilities
2.6 Visual/Aesthetics
2.7 Cultural Resources
2.8 Hydrology and Floodplain
2.9 Water Quality and Storm Water Runoff
2.10 Geology/Soils/Seismic/Topography
2.11 Paleontology
2.12 Hazardous Waste/Materials
2.13 Air Quality
2.14 Noise
2.15 Wetlands and Other Waters
2.16 Plant Species
2.17 Animal Species
2.18 Invasive Species
2.19 Cumulative Impacts
2.20 Climate Change
Chapter 3 – Comment sand Coordination
Chapter 4 – List of Preparers
Chapter 5 - Distribution List

List of Appendices
Appendix A – CEQA Checklist
Appendix B – Resources Evaluated Relative to Requirements of Section 4(f)
Appendix C – Title VI Policy Statement
Appendix D – Summary of Relocation Benefits
Appendix E – Environmental Commitments Record
Appendix F – List of Technical Studies
Appendix G – 2012 RTP and 2015 FTIP Project Listings
Appendix H – FEMA FIRM

Build Alternative 1 Layout Sheets
Build Alternative 2 Layout Sheets
Build Alternative 3 Layout Sheets
Build Alternative 4 Layout Sheets

Technical Studies

Community Impacts Assessment October 2015

Traffic Operations Report October 2015
Traffic Volume Report August 2015
Traffic Operations Report Appendix

Please submit your comments in writing no later than 5 pm, January 22, 2016 to Charles Baker, Senior Environmental Planner, California Department of Transportation, District 12, Environmental Analysis- Specialist Branch, 3347 Michelson Drive, Suite 100, Irvine, CA 92612-1692 or via e-mail to:

Thank you for your visit!