Sooner or later, your department will face litigation from the private sector when an apparatus accident occurs. It is important that your department's subject material experts, or the person(s) assigned to the training of your drivers, are prepared. Based on personal experience, I recommend that this person have several items in place.
The litigation team representing the plaintiff and your municipality's legal representatives may ask for the training and driving history of the person operating the apparatus at the time of the accident. Among areas covered are any courses and materials that were delivered during their initial probationary period, subsequent training related to driving, and any certificates awarded for course passing and completion.