Fontana, CA (June 10, 2026) – A two-vehicle crash involving a semi-truck and a GMC Yukon closed lanes on eastbound Interstate 10 near Citrus Avenue on Tuesday afternoon, June 9. The collision was reported at approximately 1:33 p.m., with early logs indicating the two right lanes were blocked.
One person was reported trapped inside the semi-truck shortly after the crash. A driver of one of the vehicles was bleeding from the head, though the full extent of the injuries was not immediately known.
By 1:44 p.m., responders confirmed the two right lanes remained blocked. A tow truck was requested for the GMC Yukon, which had sustained major damage throughout, and a SigAlert was issued for the area as traffic backed up along the freeway.
No names were released in the initial report on the accident. The cause of the crash remains under review as the investigation continues.
We wish those hurt a full and speedy recovery.
What Drivers Should Know About SigAlerts and Freeway Crash Protocols in California
A SigAlert is an official traffic notification issued in California when a freeway lane is expected to be blocked for 30 minutes or more. These alerts are communicated through radio broadcasts, electronic highway signs, and digital traffic apps to help drivers make informed decisions before reaching the backup. The system was designed to reduce secondary crashes caused by unexpected slowdowns.
When a SigAlert is active, drivers are typically advised to use alternate surface streets or adjust their departure times when possible. Rear-end crashes are among the most common types that occur in slow-moving freeway traffic, usually because drivers do not slow down in time when approaching a blockage. Maintaining a safe following distance and staying alert to brake lights ahead can reduce that risk significantly.
Major damage to a vehicle, like what was reported with the Yukon in this crash, can complicate rescue efforts and extend lane closure times. Emergency crews may need additional equipment or time to safely clear the road. That is one reason why SigAlerts frequently remain in effect longer than initially expected, affecting commuters well beyond the original crash point.
