Trucking: Driving a tractor trailer, cdl liscence, cdl class

Question
If I get a Tractor Trailor liscence or CDL liscence,what other vehicles am I allowed to drive?

Answer
With a CDL class A (tractor-trailer), you can drive any size vehicle you want except vehicles that require endorsements. Extra written test are required to pull Double & Triple trailers, Tanker trailers (liquid only), Hazardous Materials, and to transport Passengers. The Passengers endorsement requires additional driving test in a bus. Endorsements will be listed on the front of your drivers license.