Complex sentence: Before implementation of the Commercial Driver's License (CDL) Program requirements for driving larger vehicles and busses varied from state to state and in many states and the District of Columbia anyone licensed to drive an automobile could also legally drive a tractor trailer or a bus.
Split into simpler sentences: Before implementation of the Commercial Driver's License (CDL) Program requirements for driving larger vehicles and buses varied from state to state. In many states and the District of Columbia anyone licensed to drive an automobile could also legally drive a tractor trailer or a bus.