Final answer:
Commercial motor vehicles must stop at weight stations unless they fall under certain exemptions, such as passenger vehicles or emergency vehicles.
Step-by-step explanation:
All commercial motor vehicles must stop at weight stations, except for those that fall under certain categories of exemptions. The specific exemptions may vary depending on the jurisdiction, but commonly exempted vehicles include passenger vehicles, emergency vehicles, and certain agricultural vehicles. These exemptions are typically based on factors such as vehicle weight, purpose, or specific regulations of the area. It is important for commercial motor vehicle operators to familiarize themselves with the specific laws and regulations of the jurisdiction they are operating in.