What was the name of the sturdy vehicle used to trasport westward bound pioneers and their possessions?

covered or "Calistoga" wagon.

This type of wagon was also used... for carrying freight.

http://en.wikipedia.org/wiki/Conestoga_wagon

The name of the sturdy vehicle used to transport westward bound pioneers and their possessions was the covered wagon or sometimes referred to as the "Conestoga" wagon. These wagons were specially designed to endure the rough terrain and harsh conditions during long journeys. They had a wooden frame and were covered with a canvas or a similar material to protect the pioneers and their belongings from the elements. The Conestoga wagon was commonly used during the 18th and 19th centuries for both personal travel and carrying freight. To find more information about this type of wagon, you can visit the Wikipedia page on Conestoga wagons at http://en.wikipedia.org/wiki/Conestoga_wagon.