A D-licence in Ontario allows you to drive trucks weighing 24,000 lbs or more.
QUOTE
Class of licence: D - Types of vehicles allowed: Any truck or motor vehicle combination exceeding 11,000 kg (24,000 lbs) provided the towed vehicle is not over 4,600 kg (10,000 lbs)
Wish me luck!

^ I will be driving a truck like this for work related purposes.
*Note: high speed jumps are not part of the practical driver training sessions