Department of Public Safety officers investigated a rollover late Wednesday afternoon near milepost 56 on Highway 93.
Three occupants were in the vehicle as it was headed south. The driver of the truck, which was hauling construction equipment and material, for unknown reasons left the left lane and traveled into the median. The driver overcorrected, crossed both southbound lanes and the vehicle rolled over, stopping a few dozen feet from the highway, scattering tools, material and parts of the truck's trailer.
A female passenger was ejected and was taken to a Las Vegas hospital with critical injuries. The other two passengers were not seriously injured, according to a witness.