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Motor Carrier Inspection Database A database on the USDOT mainframe computer containing records of inspections of interstate and intrastate carriers. State inspection records are uploaded to the mainframe using SAFETYNET.

Interstate Carrier A carrier who sometimes or always operates in interstate or foreign commerce. For the purposes of this report, “interstate carrier” is defined also to include carriers of hazardous materials who operate in interstate, foreign, or intrastate commerce.

Inspection The systematic examination of a commercial motor vehicle and its driver to determine their overall safety fitness.

Hazardous Materials Violation A violation discovered during the inspection which pertains to the transportation of hazardous materials.

Hazardous Materials Regulations (HMR) Federal regulations governing the commercial transportation of hazardous materials. The HMR are contained in the Code of Federal Regulations, Title 49, Subtitle B, Chapter I.

Hazardous Materials Regulations (HMR) Federal regulations governing the commercial transportation of hazardous materials. The HMR are contained in the Code of Federal Regulations, Title 49, Subtitle B, Chapter I.

Hazardous Materials Materials, substances, or wastes, which, due to their compositional nature, may be toxic, harmful or fatal if accidentally exposed to humans, animals, or the environment.

Full Inspection The most comprehensive and thorough of the inspection types, it involves extensive vehicle checks – including under-the-vehicle measurement of brake performance – and examination of hours-of-service logs. This inspection type is a Level I inspection; it is also sometimes referred to as the North American Standard (NAS).

For-Hire Carrier – Exempt A for-hire carrier not subject to economic regulation by the Interstate Commerce Commission.