CDL Test in Dually

I strongly don't recommend taking in a dolly. You will be assigned an "O" restriction which will not let you drive semi trucks, and an "L" restriction which wouldn't allow you to drive any vehicle with Air Brakes (pretty much Class B trucks are also out of the question as most, if not all, of them have Air Brakes).

If you change your mind and want to remove the restriction, you will have to complete ELDT (Unfortunately, the FMCSA left out that removing restrictions except for L, E, and Z are also ELDT-mandated).