The plan was for the federal government to provide 90% of funds for the project with the state providing the difference. I-470 was added to the Federal Highway Act of 1968 and was to be part of the Interstate Highway and Defense System.
The project's funding structure involved a significant contribution from the federal government, with the state covering the remaining portion. I-470 was included in the Federal Highway Act of 1968, signifying its integration into the national interstate highway system.