Commercial vehicles refer to vehicles engaged in commercial road transportation. They are categorized into commercial road transportation and non-commercial road transportation. Below are the operating conditions for commercial vehicles: The vehicle should be clean and well-equipped, with bolts and nuts on exposed parts securely fastened, and the vehicle's power performance should be good. The engine should operate well, with normal fuel and lubricant consumption. There should be no knocking noises when the coolant temperature is above 50°C, and no leaks of oil, water, gas, or electricity. The chassis components should be securely connected, not overheating or making abnormal noises, with good performance. All lubrication points should have sufficient oil; the leaf springs should not be broken or misaligned; tire pressure should be normal; the connection and protective devices for the tractor and trailer should be complete and reliable. The steering should be light and flexible, with the tie rods and ball joints not loose, and performance should be good. The front wheel alignment should meet requirements, the foot brake effectiveness should comply with regulations, the hand brake should be reliable, and the trailer brake system should be effective. The passenger compartment or truck cab should be free of dust and rain leaks, with doors and windows tightly closed and easy to open. The windshield should provide clear visibility. The cargo box should have no holes, and the tailgate hooks should be secure and reliable. Electrical equipment should be complete and function reliably.
