Caltrans says 171 workers have been killed on the job since 1924.
Fifty-five-year-old Muoi Tran of San Jose died on October 16, 2008 from injuries sustained in a traffic accident after he visited a Caltrans construction site.
He was a transportation engineer working as part of a survey crew at the Red Bluff Maintenance Station. Caltrans Director Will Kempton took the opportunity to remind motorists "to please slow for the cone zone so our highway workers can remain safe."
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