'ATLAS of ERTMS worldwide implementation' is a survey, which presents a picture of the situation, as of August 2007, of the installed ERTMS components (ETCS & GSM-R). Information reported is extracted from the comprehensive data base per line sections and per country, reporting detailed information on infrastructure and rolling stock set at UIC. The data base is built on official information given by UIC members. ( table of contents can be added).