The Legislature has provided that, in addition to the one billion dollars ($1,000,000,000) authorized pursuant to this chapter, the Passenger Rail and Clean Air Bond Act of 1992 will be submitted for voter approval for the issuance of additional bonds of one billion dollars ($1,000,000,000) in 1992 and the Passenger Rail and Clean Air Bond Act of 1994 will be submitted for voter approval for the issuance of additional bonds of one billion dollars ($1,000,000,000) in 1994, for a total of three billion dollars ($3,000,000,000).