This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Interstate Highway plan August . PDUSGov Interstate Highway plan approved August Originally scanned by Richard Moeur and downloaded from roadfan This was drawn directly on the August map and thus does not include the changes made by September style margin auto colspan Interstate Highway System planning maps style textalign