San Diego, December 8, 2025
A tragic multi-vehicle collision occurred on State Route 805 in San Diego, early Sunday morning, resulting in at least one fatality. The crash involved a big rig and multiple vehicles. Authorities issued a SigAlert to close off the northbound transition road to northbound State Route 15 to manage traffic and investigate the cause of the incident. The California Highway Patrol is currently conducting an investigation.
San Diego
Fatal Multi-Vehicle Crash Involving Big Rig on State Route 805
A fatal multi-vehicle collision occurred early Sunday morning on State Route 805 in San Diego, involving a big rig and multiple other vehicles. The incident took place around 2:50 a.m. on the northbound route, south of University Avenue. A SigAlert was issued at 3:37 a.m., shutting down the transition road connecting the northbound route to northbound State Route 15. The California Highway Patrol is investigating the cause of the crash.
Details of the Incident
The collision resulted in at least one fatality, highlighting the serious nature of multi-vehicle accidents involving large trucks. Such incidents can lead to devastating consequences, not only for those directly involved but also for other motorists on the road. Authorities are working diligently to determine the cause of this unfortunate event to mitigate future occurrences.
Background Information
Multi-vehicle collisions, especially those involving big rigs, pose significant safety risks and can severely disrupt traffic flow. The California Highway Patrol plays a crucial role in investigating these incidents, aiming to uncover the causes to enhance roadway safety and cut down on the frequency of such tragic events.
Related Incidents in San Diego
San Diego has seen several similar multi-vehicle incidents involving big rigs over the past few years. Notably, a semi-truck caught fire in March 2025 after colliding with multiple vehicles on I-15. In July 2025, two fatal crashes occurred on Highway 67 in less than 12 hours, contributing to concerns about road safety in the region.
Safety Measures and Recommendations
Motorists are advised to exercise heightened caution when driving near big rigs, particularly during early morning hours when visibility may be less than ideal. Maintaining a safe following distance, adhering to posted speed limits, and staying informed about current road conditions can markedly reduce the risk of accidents. Staying updated on traffic advisories from the California Highway Patrol is also recommended for safe travel.
Investigation and Updates
The California Highway Patrol is vigorously investigating the causes behind this crash, with updates expected as further information becomes available. Drivers are encouraged to remain informed about traffic conditions and to heed any advisories issued by local authorities, as these can provide critical information for safe navigation.
Contact Information
For further information or to report relevant details about the accident, contact the California Highway Patrol’s San Diego office at (858) 293-6000.
Frequently Asked Questions (FAQ)
What happened in the multi-vehicle crash on State Route 805?
A fatal multi-vehicle collision occurred early Sunday morning on State Route 805 in San Diego, involving a big rig and multiple other vehicles. The incident took place around 2:50 a.m. on the northbound route, south of University Avenue. A SigAlert was issued at 3:37 a.m., shutting down the transition road connecting the northbound route to northbound State Route 15. The California Highway Patrol is investigating the cause of the crash.
What is a SigAlert?
A SigAlert is a traffic advisory issued by the California Highway Patrol to inform the public of significant traffic incidents that may cause major delays. In this case, the SigAlert was issued to notify drivers of the closure of the transition road connecting the northbound route to northbound State Route 15 due to the crash.
How can I stay informed about traffic conditions in San Diego?
Motorists are encouraged to stay updated on traffic conditions by checking the California Highway Patrol’s San Diego office website or local news outlets. Additionally, using GPS navigation apps that provide real-time traffic updates can help drivers avoid congested areas and stay informed about road closures or accidents.
What should I do if I witness a traffic accident?
If you witness a traffic accident, ensure your safety first. If it’s safe to do so, call 911 to report the incident, providing details such as the location, number of vehicles involved, and any visible injuries. Avoid leaving the scene until authorities arrive, as your information may be crucial to the investigation.
How can I contact the California Highway Patrol’s San Diego office?
You can contact the California Highway Patrol’s San Diego office at (858) 293-6000 for more information or to report any relevant details.
Key Features of the Incident
| Feature | Details |
|---|---|
| Location | State Route 805, San Diego, CA |
| Time of Incident | Approximately 2:50 a.m., Sunday, December 7, 2025 |
| Vehicles Involved | Big rig and multiple other vehicles |
| Fatalities | At least one confirmed fatality |
| Traffic Advisory | SigAlert issued at 3:37 a.m., shutting down transition road to northbound State Route 15 |
| Investigation | California Highway Patrol investigating the cause of the crash |
Deeper Dive: News & Info About This Topic
HERE Resources
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Fatal Multi-Vehicle Collision Involving Big Rig on SR-805
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Fatal Multi-Vehicle Collision on State Route 805 Raises Concerns
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Fatal Multi-Vehicle Crash Involving Big Rig on I-805
Author: STAFF HERE SAN DIEGO WRITER
The SAN DIEGO STAFF WRITER represents the experienced team at HERESanDiego.com, your go-to source for actionable local news and information in San Diego, San Diego County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as Comic-Con International, San Diego County Fair, and San Diego Pride Festival. Our coverage extends to key organizations like the San Diego Regional Chamber of Commerce and United Way of San Diego County, plus leading businesses in biotechnology, healthcare, and technology that power the local economy such as Qualcomm, Illumina, and Scripps Health. As part of the broader HERE network, including HEREAnaheim.com, HEREBeverlyHills.com, HERECostaMesa.com, HERECoronado.com, HEREHollywood.com, HEREHuntingtonBeach.com, HERELongBeach.com, HERELosAngeles.com, HEREMissionViejo.com, and HERESantaAna.com, we provide comprehensive, credible insights into California's dynamic landscape.
