To authorize the State of Florida to use Federal-aid highway funds apportioned to the State of Florida for construction of a tunnel or bridge to replace the 17th Street Causeway Bridge in Fort Lauderdale, Florida, and for other purposes.

Authorizes the State of Florida to use certain apportioned Federal-aid highway funds to pay the Federal share of either a tunnel or bridge project to replace the 17th Street Causeway Bridge in Fort Lauderdale. Reduces the cost of completing the National System of Interstate and Defense Highways in Florida by the amount used for such tunnel or bridge project.