Addressing vehicle loads on public highways.

HB 2109 requires vehicles transporting loose materials (like dirt, sand, or gravel) on Washington public highways to securely cover loads or maintain six inches of space above the load to prevent spillage. It mandates immediate cleanup of spilled materials, glass, or debris that could endanger other drivers, and requires vehicles with mud or debris to be cleaned before traveling. Violations range from infractions for minor failures to gross misdemeanors if negligence causes bodily harm. The law applies directly to commercial drivers and anyone transporting such materials, with penalties defined by the severity of the hazard created. It exempts public maintenance vehicles from sand-spreading for traction or highway cleaning.