By Crash News Writer 
Martinez, CA (September 20, 2025) – A tragic workplace incident claimed the life of a Caltrans worker early Wednesday morning during an overnight construction project along Highway 4.
According to the California Highway Patrol, 39-year-old Mahdi Khorram was fatally struck by an asphalt truck while working in a marked construction zone. The incident happened around 1:30 a.m. on September 18 in Martinez, located in Contra Costa County.
Mahdi Khorram, a Concord-based transportation engineer and construction inspector, had been with Caltrans since 2023. His death has prompted an outpouring of grief within the department. Caltrans Director Dina El-Tawansy stated, “Mahdi was more than a colleague – he was a valued member of our Caltrans family.”
In his honor, flags have been lowered to half-staff at the State Capitol, Capitol Annex Swing Space, and at all Caltrans facilities throughout California.
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PLEASE TAKE NOTICE
This report is based on statements provided by Caltrans and the California Highway Patrol. The investigation is ongoing and may yield new information. For guidance during this difficult time, see our frequently asked questions in California.
Mahdi Khorram’s identity was confirmed by Caltrans following notification of next of kin.
More details may become available regarding the driver involved and possible occupational safety reviews.
Traffic on Highway 4 may have been impacted overnight. Stay updated through official Caltrans or CHP announcements. For support services, see accident resources in California.
This post is for informational purposes only and is not intended as legal or medical advice. For full context and limitations, see our disclaimer.
To discuss your rights and legal options after a construction site tragedy, contact a qualified California personal injury lawyer without delay.