Final answer:
An enroute inspection should include checking for tire and brake overheating, as well as ensuring that the cargo is securely stowed, as all can affect vehicle operation and safety.
Step-by-step explanation:
An enroute inspection should include checking for several potential issues to ensure the safety and proper functioning of a vehicle. Among the key aspects to inspect while a vehicle is on the move are tire overheating, brake overheating, and the security of the cargo. All these factors are essential as they can each significantly affect the operation of the vehicle and its overall safety. For instance, the friction between the tires and the road can lead to tire overheating, similarly the friction within the braking system can cause the brakes to overheat, as represented in Figure 14.5 showing the smoking brakes on a truck as evidence of the mechanical equivalent of heat. The securement of cargo is equally important to prevent shifting that can affect the vehicle's balance and handling.