The AASHTO develops and publishes design standards and guidelines for such things as bridges, highways, urban roads and other transportation structures. One of its documents is, "Guide For Development of New Bicycle Facilities." This document is frequently referred to as "AASHTO". A more comprehensive AASHTO document is the "Green Book". It is the bible for road design, except it omits standards for bicycle friendly roadways. It is currently being revised to include more of a bicycle-friendly message.