On the other hand, semis, also known as semi-trucks or tractor-trailers, are typically driven by professional truck drivers who possess specialized licenses, including a commercial driver's license (CDL). CDL requirements vary by jurisdiction but generally involve passing written exams, road tests, and adherence to safety regulations.
Farmers may occasionally need to transport goods to local markets or make farm-related deliveries. For such purposes, they might use smaller vehicles like pickup trucks or trailers that do not require air brakes. However, driving a semi-truck for transport purposes usually necessitates a CDL and compliance with specific regulations and training.
So, in general, a farmer does not need air brakes to drive semis. However, if a farmer intends to drive a semi-truck, obtaining the appropriate licensing, training, and complying with the regulations is essential to ensure road safety and legal compliance.