Type describing the abstract superclass for transportation objects. Type describing transportation complexes, which are aggregated features, e.g. roads, which consist of parts (traffic areas, e.g. pedestrian path, and auxiliary traffic areas). As subclass of _CityObject, a TransportationComplex inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Type describing the class for traffic Areas. Traffic areas are the surfaces where traffic actually takes place. As subclass of _CityObject, a TrafficArea inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Type describing the class for auxiliary traffic Areas. These are the surfaces where no traffic actually takes place, but which belong to a transportation object. Examples are kerbstones, road markings and grass stripes. As subclass of _CityObject, an AuxiliaryTrafficArea inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Denotes the relation of TransportationComplex to its parts, which are traffic areas. The TrafficAreaPropertyType element must either carry a reference to a TrafficArea object or contain a TrafficArea object inline, but neither both nor none. Denotes the relation of TransportationComplex to its parts, which are auxiliary traffic areas. The TrafficAreaPropertyType element must either carry a reference to a TrafficArea object or contain a TrafficArea object inline, but neither both nor none. Type describing the class for tracks. A track is a small path mainly used by pedestrians. As subclass of _CityObject, a Track inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Type describing the class for roads. As subclass of _CityObject, a Road inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Type describing the class for railways. As subclass of _CityObject, a Railway inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Type describing the class for squares. A square is an open area commonly found in cities (like a plaza). As subclass of _CityObject, a Square inherits all attributes and relations, in particular an id, names, external references, and generalization relations. Function of a transportation complex. The values of this type are defined in the XML file TransportationComplexFunctionType.xml, according to the dictionary concept of GML3. Actual Usage of a transportation complex. The values of this type are defined in the XML file TransportationComplexUsageType.xml, according to the dictionary concept of GML3. Function of a traffic area. The values of this type are defined in the XML file TrafficAreaFunctionType.xml, according to the dictionary concept of GML3. Function of an auxiliary traffic area. The values of this type are defined in the XML file AuxiliaryTrafficAreaFunctionType.xml, according to the dictionary concept of GML3. Usage of a traffic area. The values of this type are defined in the XML file TrafficAreaUsageType.xml, according to the dictionary concept of GML3. Type for surface materials of transportation objects. The values of this type are defined in the XML file TrafficSurfaceMaterialType.xml, according to the dictionary concept of GML3.