If you drive a semi-truck for a living, it may break down so badly that you can't drive this rig anymore. It may need to be towed professionally. In that case, make sure you use heavy wrecker towing in particular. These services are important for a couple of reasons. Minimize Safety Hazards Since your semi-truck is big and weighs a lot, there are more safety hazards involved when this rig is towed compared to a normal vehicle.