Predefined Conditions Classes: Accident type items: (a) Class / Sub-Class (C/S-C): 0: Carriageway Type, Universe's Predefined Conditions (UPC): Dual Carriageway, Description (Des): All accidents happening on a dual carriageway, Definition: (Def): Carriageway Type= 'dual carriageway'; (b) C/S-C: 1-2: Carriageway Type, UPC: Single Carriageway, Des: All accidents happening on a single carriageway, Def: ('one way street', 'single carriageway'); (c) C/S-C: 3-5: Carriageway Type, UPC: Carriageway Type - Unknown, Des: All accidents happening on an unknown carriageway, IN, Def: Carriageway Type ('no data collected', 'unknown'); (d) C/S-C: 6-10: Carriageway Type, UPC: Carriageway Type - Others, Des: All accidents happening on an other carriageway types, Def: Carriageway Type in ('not applicable', 'others'); (e) C/S-C: >10: Junction Control, UPC: JC - Controlled, Des: All accidents happening at controlled. Def: Junction Control in ('controlled', ' authorized person', 'automatic traffic signal', 'give way sign or markings', 'stop sign', 'give way sign or stop sign'). (f) C/S-C: >15: Junction Control, UPC: JC - Uncontrolled or unknown, Des: All accidents happening at uncontrolled or unknown junction, Def: Junction Control in ('uncontrolled', 'unknown'). (g) C/S-C: >20: Junction Control, UPC: JC - Others, Des: All accidents happening at other types of junction, Def: Junction Control = 'others'