Mason County, TX — September 30, 2025, a man sustained injuries following an 18-wheeler accident around 7:24 a.m. along US Highway 377.

According to initial details about the accident, it happened just west of Mason near Long Horn Lane.

18-wheeler Accident on US 377 in Mason County, TX

It appears that a 28-year-old man was riding as a passenger in a tractor-trailer going southeast on the highway. The vehicle reportedly lost control and crashed, and the passenger was seriously injured. The driver had no reported injuries.

Right now, no further information is available.

Commentary by Attorney Michael Grossman

Accidents like this can sometimes be more complex than people realize. A lot of what comes next depends on what this passenger was doing in the truck.

Were they a co-worker? If so, this all might fall within the confines of a Texas work accident. Or, were they just someone along for the ride—a friend, family member, or other individual not on the job? If so, they may have the same rights as someone would if they were in a completely separate vehicle hit by the 18-wheeler.

Either way, this highlights why a single-vehicle truck wreck like this isn’t automatically open-and-shut or simple. There could be unique challenges to prepare for, and authorities alone may not be taking those steps.

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