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General Project Information

Virtual Open House Presentation (General)

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Project Location

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Project Description

Caltrans proposes to make improvements on the I-80 corridor between Postmile (PM) 40.7 (west of Kidwell Road Interchange) and PM 44.7 (Solano/Yolo County Line) in Solano County, between PMs 0.00 (Solano/Yolo County Line) and 11.72 (Sacramento River, Bryte Bend Bridge) in Yolo County, and between PMs 0.00 (Sacramento River, Bryte Bend Bridge) and 1.36 (West El Camino Interchange) in Sacramento County; and US-50 between PMs 0.00 (I-80/US 50 Junction) and 3.12 (Sacramento River, Pioneer Bridge) in Yolo County and between PMs 0.00 (Sacramento River, Pioneer Bridge) and 0.617 (US 50/I-5 Junction) in Sacramento County. The project proposes to add managed lanes on I-80 and US 50 by a combination of lane conversion, restriping, shoulder, and median reconstruction with a concrete barrier. Drainage modifications would be required due to median reconstruction in the locations to which sheet flow currently drains. Existing Intelligent Transportation System (ITS) elements and infrastructure would be modified and new ITS elements will be added which includes ramp meters, fiber-optic conduit and cables, and overhead changeable message (CMS) signs.

Project Cost 

The total project cost is between $100 million and $600 million depending on the Alternative.

Project Schedule

The proposed schedule is as follows:

  • Draft Environmental Document for Public Review: Winter 2021

  • Environmental Clearance Completed: Spring 2022

  • Design Completed: Spring 2024

  • Construction Starts: Fall 2025

Need and Purpose


The project is needed because:

  • Recurring congestion during the AM (morning) and PM (evening) 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.


The purpose of the proposed project is to:


  • Ease congestion and improve overall person throughout.*

  • Improve freeway operation on the mainline, ramps, and at system interchanges.

  • Support reliable transport of goods and services throughout the region.

  • Improve modality and travel time reliability.**

  • Provide expedited traveler information and monitoring systems.


* Throughout is the number of people moving efficiently through a region.

** 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.

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