Mega rules specifies that triples do not count as doubles for going to jail as the player does not roll again. Used in a regular edition, the bus (properly "get off the bus") allows the player to use only one of the two numbered dice or the sum of both, thus a roll of 1, 5, and bus would let the player choose between moving 1, 5, or 6 spaces. The Speed Die is used throughout the game in the "Mega Edition", while in the "Regular Edition" it is used by any player who has passed GO at least once. In these editions it remains optional, although use of the Speed Die was made mandatory for use in the 2009 U.S. and World Monopoly Championship, as well as the 2015 World Championship.