How often must a vehicle typically be inspected?

A vehicle must typically be inspected every year or as specified by state regulations to ensure it meets safety and emissions standards. This annual inspection requirement is designed to help maintain road safety by identifying any potential mechanical issues, structural problems, or environmental hazards related to the vehicle's emissions. Regular inspections also help ensure that vehicles are compliant with evolving safety regulations, which can vary based on changes in state laws.

In Missouri, for instance, vehicles that are more than 10 years old or certain types of commercial vehicles may have additional requirements beyond the standard yearly inspection. This ensures that all vehicles operating on public roads remain safe and efficient for both the occupants and the environment.

The other options suggest less frequent inspections, which could lead to deteriorating vehicle safety and increased risks on the road, and more regular checks are in place to protect public safety.