California Commercial Learner's Permit & CDL Preparation California CDL Commercial Handbook
T endorsement

Doubles & Triples

Coupling order, converter dollies, inspections, rollover, crack-the-whip, and emergency handling.

Every connection multiplies risk

Dolly, pintle hook, chains, lines, brakes and trailer order must be checked.

The last trailer moves the most

Crack-the-whip and rollover risk increase toward the rear.

Plan uncoupling

Control all units before releasing a connection.

Module progressNot completed