That really depends on what your needs are. In general, bus transportation is much better for the environment but it can be difficult to carry home groceries, for example.
I'm pretty sure cars is a form of 'transportation'. Transportation is when you transport (move) something from one place to another.You can move yourself using a car from one place to another.
Water transportation on a canal can be performed by one or two horses pulling an amount of cargo that would take many more horses to haul over land. This made canal transportaion much cheaper and...