Question: Is it legal for people (kids and adults) to ride in the back of a pickup truck?
Answer: This question comes up occasionally. The legality is covered under RCW 46.61.688, Safety belts, use required.
If you are 16 or older and if all of the seat belt positions have occupants, it would be legal to ride in the bed of the pickup truck. You must be in the bed of the truck, not on the rail or on the wheel well. If you are under 16, it is not legal.
The legality of this must also be ...