The Department of Transportation requires that all commercial motor vehicles (CMVs) of more than 10,000 pounds undergo annual inspections. The six levels of DOT inspections include:
- North American Standard Inspection: Examining documents such as at the vehicle operator's driver license and medical certificate, as well as key parts of the CMV, such as the seat belt, exhaust system, turn signals, head and tail lamps, fuel system and more.
- Walk-Around Driver/Vehicle Inspection: Examining everything in the Level I inspection except an inspection under the CMV.
- Driver-Only Inspection: Reviewing the vehicle operator's driver's license, medical certification and daily log.
- Special Inspection: One-time examinations that look at specific items.
- Vehicle-Only Inspection: An examination without the driver of everything included in Level 1.
- Enhanced NAS Inspection for Radioactive Shipments: Includes select radiological shipments.