Lyndon Johnson actually said...

Our unequalled highway network, constantly being expanded and improved, makes us the most mobile country in the history of man

We have sounded a sure and a certain note; namely, that great change can be wrought by reason and not rifles, by builders and not bullets.

It is essential that Americans understand and appreciate the importance of highway transportation to their social and economic progress, and...

American ingenuity and determination are constantly being applied to improve and expand this system.