The TDG handbook is a handy reference guide that contains a summary of the material covered in the TDG training programs. Clearly written Pocket-sized Full-colour It is designed to be used with DanatecпїЅ`s TDG instructor`s manual. , TDG self-teach program. or TDG online training course. The content is clearly written and easy to understand, and includes a class guide and checklist for handy reference to the TDG requirements.