42 feet to the gallon can take up to 150 gallons to go one mile. Various methods of transportation were considered by NASA during the planning for Apollo, including a barge and canal system and a rail system. But most of NASA's potential concepts proved impractical or too expensive for moving such a tremendous load. After much study, it was decided that a cross-land trapped vehicle or transporter would be the best choice. The idea was to use a large trapped machine, like those used in strip mining, as the method of transportation.