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Table 2 - Description of the road infrastructure: table of standard attributes. 
ROAD CLASSIFICATION 
IDENTIFICATION CODE 
TOPONYM 
MOTORWAY 
STATE 
PROVINCIAL 
COMMUNAL 
RURAI 
WIDTH 
CONDITION 
IN USE 
IN DISUSE 
IN CONSTRUCTION 
IN MAINTENANCE 
SITE 
TRENCH 
VIADUCT 
TUNNEL 
STRETCH 
URBAN 
EXTRAURBAN 
INITIAL AND FINAL NODE 
REAL NODE 
MOTORWAY PAY TOLL 
PARKING AREA 
SERVICE AREA 
SERVICE 
RAILWAY STATION 
RAILWAY STOP 
PORT 
AEROPORT-HELIPORT 
HOSPITAL 
CIVIL PROTECTION INFRASTRUCTURES 
CAMPING SITE 
SUPPORT 
INTERSECTION WITH MAP BORDER 
WIDTH CHANGE, CONDITION, SITE, ETC 
NETWORK 
START-FINISH 
INTERSECTIONS 
INTERSECTION NODE 
OVER-PASS 
UNDER-PASS 
CROSSING 
BRIDGE OR VIADUCT 
3. NECESSARY DATA FOR THE ROAD CADASTRE 
The most complex phase of the process of the survey is 
without doubt that which, after the definition of the 
elements that must be measured and introduced into 
the information system, concern the acquisition of data. 
This operation is more complex than it seems, in as 
much the data are various, collected from different 
sources, not always easily available and in many cases 
require direct measurements in the field. 
It is therefore useful that the analysis and the 
identification of the data is followed by an evaluation of 
the difficulty and of the cost of information collection 
(this changes from country to country and from region 
to region), this then leads to a hierarchy in order of 
importance and determines the level of priority for 
acquisition (tab. 2 shows the data of each family 
according to a possible order of decreasing 
importance). 
4. STRUCTURE OF THE INFORMATION SYSTEM 
The Information System must allow the insertion, 
manipulation and the presentation of the survey data of 
the road infrastructure and works. 
The survey, from an information point of view, has a 
distributed structure, autonomously managed by each 
managing body with a modality determined by the 
central level. 
All the information contained in the archives refers to 
stretches of roads, therefore the access key to the 
different tables must be structured based on the 
denomination or Road Cadastre (R.C.) and the 
denomination of the stretch. The choice of the code for 
the road and the stretch is thus fundamental for the 
correct functioning of the entire system. 
This choice must be accompanied by a complex of 
rules designed to introduce new infrastructures and to 
represent the various types of modifications that could 
be used other than those pre-existing.