Transportation
Publications
AASHTO Guide for the Development of Bicycle Facilities (3rd Edition),
American Association of State Highway and Transportation Officials, 1999
Bicycles/Pedestrians: AASHTO Guide for the Development of Bicycle Facilities
This AASHTO bike guide is recommended as minimum guidelines for bicycle transportation facilities and shared use paths, but it is not intended for bicycle trails in rough terrain or mountain bike use.
http://bookstore.transportation.org/