Between 1935 and 1950, a consulting firm named Coverdale and Colpitts wrote a series of data-filled reports on the new streamline trains (most pre-war sources used the word “streamline” rather than “streamlined”). These include:

• The 1938 report
• The 1939 Report
• The 1941 Report
• The 1945 Report which just covers Seaboard Air Line, and
• The 1950 Report

There were no reports after 1950. It may only be coincidental, but 1950 was the year the Interstate Commerce Commission imposed its speed limits on passenger trains, which severely dampened railroad interest in high-speed rail in the United States. This may have discouraged Coverdale and Colpitts from writing any further updates to its reports.