What is a tulip?
Is it a flower? What does a tulip have to do with roadbooks? Well, a tulip is a drawing of the place (road intersection, railroad crossing, bridge, ditch, washout, or other landmark) the roadbook author wants to share with you to help you find your way.
Deciphering a note.
A note in the roadbook is composed of 3 boxes going across the page. Each box holds information to help you.