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The DRG locomotive classification system was developed by the German Imperial Railway Company or Deutsche Reichsbahn-Gesellschaft (DRG), which was formed in 1924 following the merger of the German state railways (''Länderbahnen'') in 1920.〔Between 1920 and 1924, the new railway organisation was simply called the 'Deutsche Reichsbahn'〕 A common classification and numbering scheme was needed in order to organise effectively the four hundred or so different steam locomotive classes taken over from the state railways, as well as new locomotives. This process lasted until 1926. Only then was the final renumbering plan fixed. Similar systems for electric and internal combustion engined locomotives and railbuses were not developed until the 1930s, as the numbers of these types of motive power continued to rise and the previous schemes proved no longer adequate. This classification or numbering system was repeatedly adjusted, and was continued by the Deutsche Bundesbahn until 1968 and by the Deutsche Reichsbahn in East Germany until 1970. After that the two German railway administrations introduced new computerised vehicle numbers; nevertheless the new DB classification scheme and DR classification scheme were still based on that of the DRG. In addition to the class numbers, a secondary system of German locomotive types was developed that contained the most important operating parameters of the locomotives and which was usually displayed on the cab sides. == Steam Locomotives == The basic numbering system for steam locomotives comprised a class number and a serial number. The class number had two digits, the serial number had three to four digits. New locomotives procured by the DRG were allocated their own class number. Locomotives taken over from the state railways on the foundation of the DRG were grouped into overall classes according to wheel arrangement and role, with each sub-class (''Gattung'', the equivalent of a former state railway 'class') being allocated its own range of serial numbers within its class. A system of 99 class numbers (''Baureihennummer'', originally called ''Stammnummer'') was established which were grouped as follows: * 01–19: Express train locomotives * 20–39: Passenger train locomotives * 40–59: Goods train locomotives * 60–79: Passenger train tank locomotives * 80–96: Goods train tank locomotives * 97: Rack railway locomotives * 98: Branch line locomotives * 99: Narrow gauge locomotives (''Lokalbahnlokomotiven'' or ''Kleinbahnlokomotiven'') The lower class numbers in each of the first five groups were reserved for the new standard locomotives ''Einheitslokomotiven'' that were to be built. The higher numbers in each group were given to the state railway locomotives inherited by the DRG. Their division into state railway sub-classes was achieved by allocating sequential serial numbers, with the last two digits of the serial number being used to denote the individual vehicle and the one or two preceding digits indicating its sub-class. Locomotives that were on the verge of retirement, were given serial numbers from 7001 onwards. Locomotive sub-classes were indicated by a superscript such as '983'. The simplified way of writing this was to write the sub-class after a decimal point so that a 'Class 983' could also be written 'Class 98.3'. The class number was independent of the type of tender attached. Tenders did not have their own numbers but displayed the number of their locomotive at the rear. The Deutsche Bundesbahn and the East German Deutsche Reichsbahn later incorporated additional classes within the classification scheme for new locomotives as well as for many of the rebuilt engines. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「DRG locomotive classification」の詳細全文を読む スポンサード リンク
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