This page has links to city scans from the "Yellow Book", which was a book from 1955 detailing the then-proposed Interstate Highway system. Besides the main Interstate system connecting the metropolitan areas of the country, the Yellow Book also included maps of the proposed urban Interstates within many of those metropolitan areas. The following links, grouped by state, show those proposed urban Interstates from 1955: The national system: •Toll roads suggested in 1938 •A Master Plan for Free Highway Development, dated 1939 •Interregional Highways, dated ca. 1943 •Proposed National System of Interstate Highways, August 2, 1947 •Existing and then-proposed toll...