What is an 'out-of-service' order related to CMVs?

Answer: B — temporary prohibition against driving

An 'out-of-service' order related to commercial motor vehicles (CMVs) is a temporary prohibition against driving. This order may be issued when a driver or vehicle is found to be in violation of safety regulations. For instance, if a commercial driver is operating under the influence, has serious maintenance issues, or fails to comply with other federal or state safety requirements, they can be placed out-of-service. During this period, the driver is not allowed to operate a CMV, ensuring both their safety and the safety of the public until the issues are resolved. This order is a critical enforcement tool used to maintain road safety and compliance with transportation regulations.