A DOT analysis checks six levels of safety for a truck. The aim is to make sure all parts of the truck are in perfect working order and the driver is qualified to handle the truck.
Level I is the North American Standard Inspection. This level involves scrutinizing the necessary documents and physical aspects of the truck. Documents checked by the DOT inspector include the driver’s license, logs and medical card. Physical aspects considered include the lights, tires, brakes, engine and transmission system.
Level II, also called the walkaround inspection, involves evaluation of aspects that don’t require the inspector to get under the truck. These aspects include the paperwork for the truck, load and driver.
Level III is the driver/credential inspection. The inspector focuses on aspects directly affecting the driver, such as the medical card, seat belt, driver’s license and Hazmat requirements.
Level IV looks at a specific item on the truck. The inspector performs this inspection in response to a past discovery.
Level V is similar to level I, the only difference being the absence of the driver. The inspector performs this inspection at any location.
Level VI is for trucks transporting radiological materials. The inspector only performs this inspection if the shipments fall under the highway route controlled shipments as set by DOT.