Inspecting your vehicle prior to driving is also an important section in your trucking safety plan. Learning how to properly check tires for wear is often overlooked, yet it is one of the most important topics to discuss in your safety plan. Fluid levels and mirrors must always be checked before hitting the highway. Frequent inspections of brakes and other systems that can wear easily go a long way toward preventing issues before they occur. A solid preventive maintenance program is essential for a successful safety plan.