What is the maximum age under which a child cannot be left in a car with the motor running?

In Washington State, the law specifies that a child under the age of 16 years cannot be left in a car with the motor running. This regulation is designed to ensure the safety of children in vehicles, since leaving them unattended can expose them to various dangers, including heat-related illnesses, accidents, or unauthorized vehicle use.

By setting the maximum age at 16, the law provides flexibility for older adolescents, who may have the capacity to handle certain situations more responsibly than younger children. However, the emphasis remains on the potential risks associated with leaving younger children alone in a running car, which could lead to harmful consequences. Understanding this age threshold is crucial for responsible caregiving and compliance with local laws.