Reading list: Transportation-Markings Database
Transportation-Markings Database encompasses five monographs. Four of these are modal in form (Marine, Aero, Road, Rail). They contain category and alphabetical indexes of the individual terms accompanied by description of the terms. The database draws on the General Classification as well as the individual modal monographs. The classification provides a structure for the description of the many terms. The final database monograph, Composite Categories Classification & Index, draws together those aspects of each of the monographs. It does not include description of terms. A traditional index (an alphabetical index of every occurrence of a term) has been added to the modal subdivisions. Note: the alphabetical index for each mode list the primary usage of each term not every occurrence.

Marine Aids to Navigation, 1st ed., 1997; 2nd ed., 2007
Traffic Control Device, 1st ed., 1998; 2nd ed., 2008
Railway Signals, 1st ed., 2000; 2nd ed., 2009
Aero Navigation Aids, 1st ed., 2001; 2nd ed., 2009
Composite Categories Classification & Index, 1st ed., 2006