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:
California Interregional Road System.svg This is map of the Interregional Road System routes that have not been built are lighter shade of pink and routes that are not part of it are thin gray The urbanized areas are as of Email me if you would like copy of the GIS data created for the highways own assumed NE Maps of California's