This CDL Doubles & Triples Study Manual covers everything that you need to know to pass your CDL Doubles Triples exam. This is a fully illustrated, detailed training manual for CDL Commercial Drivers License Doubles & Triples. This manual covers all aspects of the educational criteria from the Code of Federal Regulations Title 49, needed to pass the CDL Doubles Triples exam. This manual teaches about double & triple definitions, why to obtain the endorsement, how to obtain the endorsement, proper placement of the heaviest trailer, inspections, basic operating and driving skills, handling, stability, off-tracking, response to steering, sensory feedback, braking, oscillatory sway, rollovers, yaw stability, steep grades, passing, highway driving, parking, backing, areodynamic buffeting, view blockages, placement and much more. This unique training manual also includes informative illustrations, educational references, and a sample test with questions and answers. This is most informative CDL doubles & triples training tool available on the market. It is up to date with the latest FMCSA regulations and revisions.