Long-planned I-80/SR 65 interchange fix faces $800M funding challenge

Transportation officials in Placer County are looking at breaking up the long-planned I-80/SR 65 interchange improvement project into smaller, more fundable pieces as the full buildout remains far beyond currently available funding.

Placer County Transportation Planning Agency (PCTPA) held a two-day value engineering workshop on March 2 and 3 to look at what could be done at the interchange for far less than the full project cost. At the agency’s March 25 board meeting, Executive Director Matt Click said the project now has an estimated cost of $800 million and that the agency does not have that amount available.

The workshop brought together local jurisdictions and consultants, including Caltrans, Mark Thomas, and Jacobs Engineering. Participants were asked to think about how improvements could be broken into roughly $50 million to $75 million phases that line up with realistic grant opportunities and construction packages.

The group came up with more than 20 ideas, ranging from about $25 million to $80 million. A consultant team is now analyzing those concepts, with a more detailed presentation expected this summer. The agency expects the resulting package of projects to be folded into its three-year plan for pursuing state and federal grants.

Funding is expected to come from a mix of grants and impact fees. Placer County is not a “self-help” county, meaning it does not have a voter-approved local transportation sales tax that could provide a dedicated local match for major road projects.

The I-80/SR 65 interchange is one of South Placer County’s most important freeway connections, but it has become a persistent bottleneck as the county has grown. Originally designed in the mid-1980s for a county population of roughly 136,000, the junction handled nearly 210,000 vehicles daily as of 2020. Today, Placer County’s population is about 442,000, according to the U.S. Census Bureau’s July 2025 estimate. Interstate 80 alone carries an estimated $4.7 million in goods movement every hour, according to  earlier project materials.

Federal and state environmental approvals were secured in September 2016 for three phases of improvements. The first phase added a third northbound lane on Highway 65 from I-80 to Pleasant Grove Boulevard and included improvements to the Galleria Boulevard/Stanford Ranch Road interchange. That $50 million phase was funded in 2017, began construction in April 2018, and marked completion with a ribbon cutting in September 2019.

However, the remaining phases were left without funding. At the time, the agency said it lacked money to design or construct phases 2 and 3, which then had a combined estimated cost of $580 million. Those later improvements were expected to include a new three-lane direct flyover from eastbound I-80 to northbound Highway 65, connector lane improvements, I-80 widening, replacement of the Taylor Road bridge, and widening Taylor Road between Roseville Parkway and Pacific Street.

PCTPA’s previous project benefits materials stated that without improvements, the average evening commute from I-80 at Riverside Avenue/Auburn Boulevard to SR 65 at Blue Oaks Boulevard was expected to more than triple, from 9 minutes to 35 minutes, within eight years. With the full project completed, that same trip was projected to take about 7 minutes.

Today, PCTPA is continuing separate work on SR 65, including a third southbound lane from Blue Oaks Boulevard to Galleria Boulevard, a southbound auxiliary lane from Pleasant Grove Boulevard to Galleria Boulevard, and widening the Galleria Boulevard southbound off-ramp to two lanes. The agency is working to secure regulatory approvals and permits by the end of 2026, with construction expected to begin in early 2027. Environmental revalidation is also ongoing for future SR 65 express toll lane work, though future phases depend on grant funding.