395 is a major transport route between southwest cali & nevada to northwest oregon & washington regiosn. this truck was more than likely en-route between these regions. additionally, this would be near the east gate into yosemite, and 80 miles or so from anywhere near the main valley floor of the park.
any airboure hazard from the accident would be eastwardly towards hawthorne, tonnopah, mono lake and a hazard to these areas would be a stretch. there is just no significant amount of population out there.