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Yolo 80 Corridor Improvements Project

To review the Final Environmental Document, scroll down to the section titled Final Environmental Document (2024)

The California Department of Transportation (Caltrans), in collaboration with stakeholders, proposes to construct improvements consisting of managed lanes, pedestrian/bicycle facilities, and Intelligent Transportation System (ITS) elements along Interstate 80 (I-80) and United States Route 50 (US-50) from the Solano/Yolo County line, through Yolo County, and to West El Camino Avenue on I-80 and Interstate 5 (I-5) on US-50 in Sacramento County.

map of yolo county project limits

Caltrans, as assigned by the Federal Highway Administration (FHWA), is the lead agency under the National Environmental Policy Act (NEPA) for the Caltrans EA 3H900 Yolo 80 Managed Lanes Project (project). Caltrans is also the lead agency under the California Environmental Quality Act (CEQA).

Purpose and Need

Purpose

The purpose of the proposed project is to:

  • Ease congestion and improve overall person throughput1.
  • Improve freeway operation on the mainline, ramps, and at system interchanges.
  • Support reliable transport of goods and services throughout the region.
  • Improve modality2 and travel time reliability.
  • Provide expedited traveler information and monitoring systems.

Need

The proposed project is needed for the following reasons:

  • Recurring congestion during the AM and PM peak periods exceeds current design capacity limiting person throughput.
  • Operational inefficiencies lead to the formation of bottlenecks due to short weaving and merging areas as well as lane drops.
  • Inefficient movement of goods and services impedes regional and interstate economic sustainability.
  • The corridor users rely heavily on single occupancy vehicles, with limited multi-modal options such as transit, carpool, bicycle, and pedestrian facilities resulting in unreliable travel times.
  • Lack of real time traveler information and coordinated traffic communication systems impedes timely response to roadway incidents resulting in secondary collisions and increased non-recurring congestion.

1 Throughput is the number of people moving efficiently through a region.

2 Modality is the variety in modes of transportation. This includes access and multiple options for the movement of people and goods. Examples include access to transit, carpool, bicycle, and pedestrian facilities.

Project Alternatives

This section describes alternatives that were developed to meet the purpose and need of the project. The preferred alternative is 4B.

  • Build Alternative 2a: Add a high-occupancy vehicle lane in each direction for use by vehicles with two or more riders (HOV 2+).
  • Build Alternative 2b: Add a high-occupancy vehicle lane in each direction for use by vehicles with two or more riders (HOV 2+) and build an I-80 managed lane direct connector.
  • Build Alternative 3a: Add a high-occupancy toll lane in each direction for free use by vehicles with two or more riders (HOT 2+). Single-occupied vehicles would pay a fee for lane usage.
  • Build Alternative 3b: Add a high-occupancy toll lane in each direction for free use by vehicles with two or more riders (HOT 2+) and build an I-80 managed lane direct connector. Single-occupied vehicles would pay a fee for lane usage.
  • Build Alternative 4a: Add a high-occupancy toll lane in each direction for free use by vehicles with three or more riders (HOT 3+). Vehicles with less than three riders would pay a fee for lane usage.
  • Build Alternative 4b: Add a high-occupancy toll lane in each direction for free use by vehicles with three or more riders (HOT 3+) and build an I-80 managed lane direct connector. Vehicles with less than three riders would pay a fee for lane usage.
  • Build Alternative 5a: Add an express lane in each direction (i.e., everyone would pay a fee to use the lane, regardless of the number of riders).
  • Build Alternative 5b: Add an express lane in each direction (i.e., everyone would pay a fee to use the lane, regardless of number of riders), and build an I-80 managed lane direct connector.
  • Build Alternative 6a: Add a transit-only lane in each direction.
  • Build Alternative 6b: Add a transit-only lane in each direction and build an I-80 managed lane direct connector.
  • Build Alternative 7a: Repurpose the current number one general-purpose lane for use by vehicles with two or more riders (HOV 2+); no new lanes would be constructed.
  • Build Alternative 7b: Repurpose the current number one general-purpose lane for use by vehicles with two or more riders (HOV 2+); no new lanes would be constructed. Build an I-80 managed lane direct connector.
 
Total Project Cost

Total Project Cost:  $465 million

Schedule

Draft Environmental Document (DED) for Public Review: November 13, 2023

Public Circulation Comment Period End: January 12, 2024

Final Environmental Document and Clearance Complete: May 1, 2024

Design Complete: May 10, 2024

Construction Start: Fall 2024

Final Environmental Document (2024)

Final Environmental Document is located here (State Clearing House Link)

Accessibility Assistance: Caltrans makes every attempt to ensure our documents are accessible. Due to variances between assistive technologies, there may be portions of this document which are not accessible. Where documents cannot be made accessible, we are committed to providing alternative access to the content. Should you need additional assistance, please contact us at (916) 654-2852 (and/or a division contact) or visit https://dot.ca.gov/request-ada-compliant-documents

Cover TitlePage_FONSI_Summary (PDF)
Table of Contents (PDF) 
Chapter 1 Proposed Project (PDF)
Chapter 2 Affected Environment, Environmental Consequences, and Avoidance, Minimization, and/or Mitigation Measures (PDF) 
Chapter 3 California Environmental Quality Act Evaluation (PDF)
Chapter 4 Comments and Coordination (PDF) 
Chapter 5 List of Preparers (PDF)
Chapter 6 Distribution List (PDF) 

List of Appendices

Appendix A Section 4(f) Findings for the I-80 Corridor Improvements Project 
Appendix B Title VI Policy Statement 
Appendix C Avoidance, Minimization, and/or Mitigation Measures Summary 
Appendix D List of References 
Appendix E Standard Measures 
Appendix F Abbreviations and Acronyms 
Appendix G Notice of Preparation 
Appendix H List of Technical Studies 
Appendix I Preliminary Design Plans
Appx K SHPO Determination
Apprx L AB 52 Summary
Appx M USFWS Biologial Opinion 
Appx N Species Lists

Appendix J Air Quality Calculations and Conformity Determination

Appendix K State Historic Preservation Officer Determinations of Eligibility 
Appendix L Assembly Bill 52 Consultation 
Appendix M U.S. Fish and Wildlife Service Biological Opinion 
Appendix N Species Lists 

Circulation Material

Interagency Consultation Package

POAQC Public Notice

Technical Studies

Community Impact Assessment
Air Quality Report
Cumulative Impact Hydraulics Study
Natural Environmental Study
Memorandum
Paleontological Identification Report
Floodplain Hydraulics Study
Initial Site Assessment
Traffic Analysis Report
NES Appx C Botanical Resources
NES Appx D Aquatic Resources Survey
NES Appx E Giant Garter Snaker Habit
NES Appx F BatHabitat Assessment
Nes Appx G Tricolored Black Bird Nesting Habitat Assessment
NES Appx H Swainson Hawk
NES Appx I Burrowing Owl Protocol Survey Results
NES Appx J Valley Elderberry Longhorn Beetle Habitat Assessment 
Noise Abatement Decision Report
Noise Study Report
VTM Mitigation Memo
VTM Mitigation Plan

Contact Us

Gurtej Bhattal
Project Manager
(530) 720-6153
gurtej.bhattal@dot.ca.gov

Dennis Keaton
Public Information Officer 
(530) 825-5252
dennis.keaton@dot.ca.gov 

Comments:
Yolo80corridor@dot.ca.gov

Helpful Links

  • Check out the Transit Providers to find one in your area, and even use the Google Transit Trip Planner to find routes and times for Regional Transit, Roseville Transit or Yolo Bus services.
  • Check out the Seats Available in vanpools, or find out how to start your own here.

Partner Links