A 56-year-old woman from Dixon and a 65-year-old man from Vacaville are dead after their SUV veered off eastbound Interstate 80 and slammed into an embankment near the Highway 113 interchange in Solano County. The California Highway Patrol says the driver died at the scene, while her passenger died en route to the hospital. Authorities have not released either victim's identity.
According to CBS Sacramento, CHP responded to a report of a vehicle leaving eastbound I-80 near the Highway 113 interchange just before 12:30 p.m. Officers found a 2011 black Infiniti FX35 that had crashed into an embankment on the right shoulder. The crash remains under investigation, and the outlet's report notes that DUI is not currently indicated as a possible factor.
A witness told authorities the driver appeared to be asleep at the wheel before the vehicle left the roadway, per the same account. That detail points investigators toward driver fatigue or a possible medical emergency as they work to determine what caused the SUV to leave the freeway.
A Holiday Weekend Under Heightened Patrol
The crash happened as the California Highway Patrol was in the middle of its statewide 78-hour Labor Day Maximum Enforcement Period, which began at 6:01 p.m. on the Friday before the holiday and placed all available uniformed officers on duty through Monday, according to KHTS Radio. The enforcement period increases visibility and monitoring on state freeways during major holiday travel, though it did not prevent this deadly outcome on one of the region's busiest corridors.
The stretch of I-80 near the Highway 113 interchange sits at a critical junction for the region. State Route 113 serves as the primary north-south corridor through Dixon, crossing I-80 between Vacaville and Dixon, where the freeway carries heavy volumes of commuter and freight traffic between the Bay Area and the Sacramento Valley, per the City of Dixon.
What Fatigue Does to a Driver Behind the Wheel
If drowsiness turns out to be a factor, it would fit a pattern safety researchers say is chronically undercounted. A 2024 AAA Foundation for Traffic Safety study found that 17.6 percent of fatal U.S. crashes between 2017 and 2021 involved a drowsy driver, accounting for roughly 30,000 deaths, according to the Governors Highway Safety Association. The National Safety Council notes that going 20 continuous hours without sleep produces cognitive and reaction-time impairments comparable to driving at a 0.08 blood-alcohol concentration, California's legal limit for impaired driving, and warns that drowsy driving can trigger micro-sleeps in which a vehicle travels hundreds of feet without any driver input.
A Corridor With a Grim Recent History
This is not the first multi-fatality crash to strike this stretch of Solano County in recent months. Just five weeks earlier, on July 31, a head-on collision on Highway 113 between Dixon and Vacaville killed three people and shut down the rural highway entirely, as reported by CBS Sacramento. And on July 13, a pre-dawn crash on eastbound I-80 near Lagoon Valley Road in Vacaville killed a 28-year-old motorcyclist and triggered secondary collisions involving five other vehicles, according to Hoodline's earlier reporting.
The pattern extends across the wider Bay Area as well. Metropolitan Transportation Commission statistics show regional traffic fatalities rose 48 percent between 2010 and 2020, with single-vehicle roadway departures representing a primary contributor to severe crashes. Statewide, UC Berkeley's Safe Transportation Research & Education Center found that 32 percent of California's 2023 traffic fatalities were speeding-related, totaling 1,303 deaths.
Identities Withheld Pending Coroner Verification
Under Solano County protocol, official identification of people who die in traffic collisions is handled exclusively by the Solano County Sheriff-Coroner's Office, which withholds names until forensic verification and next-of-kin notifications are complete. That process explains why the Dixon driver and Vacaville passenger have not yet been publicly named.
CHP collision investigators have not released a determined cause, and toxicology results have not been made public. Solano County has already seen several fatal highway incidents this year, including a wrong-way crash on I-505 that killed a Vacaville woman in late August, a double-fatality wreck near a Fairfield off-ramp in early August, and a triple-fatality wrong-way collision on I-80 in January — a run of crashes that has kept this section of freeway under close scrutiny even before the Labor Day weekend tragedy.
