Novato, CA (August 14, 2026) — On Wednesday, August 12, a three-vehicle collision was reported at about 9:06 p.m. on southbound U.S. 101 near the San Antonio Road on-ramp in Petaluma. The incident was classified as a minor-injury crash.
Tow assistance was requested for two of the vehicles. Dispatch records described a white Honda Civic with major rear damage and a gray Toyota Corolla with moderate front-end damage. A towing company was later assigned to remove both vehicles.
The cause remains under review. We wish those affected by this collision a swift and full recovery.
Where the Crash Happened: U.S. 101 Near San Antonio Road
The collision was reported on the southbound U.S. 101 near the San Antonio Road on-ramp. An on-ramp creates a transition area where entering motorists join vehicles already moving along the highway.
That roadway layout requires drivers to account for both through traffic and vehicles adjusting their position as they enter the southbound lanes. The source does not provide additional information about the exact lane configuration or traffic conditions at the time.
What We Know
- The incident was reported at approximately 9:06 p.m.
- Three vehicles were involved.
- The crash was classified as involving minor injuries.
- A white Honda Civic was reported with major rear damage.
- A gray Toyota Corolla was reported with moderate front-end damage.
- Tow service was arranged for both the Honda and the Toyota.
What Vehicle Damage Can Show in a Multi-Vehicle Collision
The different damage reported to the Honda Civic and Toyota Corolla can provide investigators with part of the physical record of the collision. Rear damage to one vehicle and front damage to another may help investigators determine where contact occurred, but those details alone do not establish the complete sequence of events in a three-vehicle event.
Because a third vehicle was also involved, investigators would need a broader view of the scene before determining how the impacts unfolded. In multi-vehicle crashes, one contact can alter a vehicle’s direction or position before another impact occurs, making the full sequence more complicated than the damage to any single vehicle suggests.
How This Collision Is Investigated
Investigators can review roadway conditions around the San Antonio Road entrance, including lane markings, vehicle locations, and other physical evidence at the scene. Those details may help clarify where each vehicle was traveling before the collision.
Accounts from the involved drivers or other witnesses can then be compared with the physical evidence. Because the dispatch record contains only an initial description of the scene, it does not provide enough information to determine fault or explain why the collision happened.
What to Do After a Car Crash
People involved in a California collision can use the completed crash report to review information documented after officers have investigated the scene. Keeping photographs, medical records, repair information, towing documents, and insurance correspondence together can also help preserve details while the report is being completed.
For crashes investigated by the California Highway Patrol on freeways, state highways, or in unincorporated areas, the California spreadsheet row lists the California Highway Patrol as the report agency. Reports may be obtained through the CHP Crash Portal at crashes.chp.ca.gov or with a CHP 190 form by mail or in person.
The report form is CHP 555, and CHP 190 is the request form. The online portal fee is $22, while mail or in-person requests cost $10 per 25 pages through CHP.
Reports are available after the officer files them, and the portal shows when a report is ready. Under Vehicle Code § 20012, a party of interest includes a driver, passenger, vehicle or property owner, parent or guardian, or legal or insurance representative. California Highway Patrol reports are not public and are restricted to parties of interest, with no fixed day window for public release.
Local Accident Reports compiles incident information from official agencies and credible local sources. Details from initial reports may be updated as official investigations conclude. If you have direct knowledge that any information here is inaccurate, please contact us so we can review and correct the record.
