Contra Costa County, CA (February 20, 2026) – The California Highway Patrol reports that authorities are probing an injury-involved hit-and-run collision that took place on February 20 at the San Marco Blvd and State Route 4 intersection. The crash occurred at approximately 12:38 p.m. When a suspect vehicle entered westbound SR-4 from the San Marco Blvd on-ramp. Two vehicles were in the incident, with one fleeing before police arrived. The crash took place on the right-hand shoulder, causing at least one injury, although the severity has not been publicly disclosed. Emergency units reached the scene soon after 12:44 p.m. and started probing the details of the hit-and-run. Officials are still examining the crash’s cause, with additional information to be shared as it emerges. We’re keeping those injured in our thoughts as they get medical treatment. Why On-Ramp Crashes Like This One on SR-4 Pose Risks for Drivers. On-ramps to highways frequently feature merging vehicles, differing speeds, and sudden lane shifts—all factors that can lead to accidents. Side-swipe and rear-end collisions frequently occur when drivers merge onto a congested freeway like SR-4 without yielding or checking blind spots. Fleeing the scene after a crash postpones medical assistance and endangers victims.
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Note: We provide this information as a public resource to help raise awareness and support those who may be affected by similar incidents. Our intent is to honor the victims of accidents and to provide information that may help others avoid similar tragedies in the future. The photos used in these posts are not representative of the actual accident scene. If you or a loved one has been injured in an accident, please contact Hillstone Law at (855) 691-1691. Our attorneys are available to answer your legal questions and help you understand your rights.
