Indian railways will replace the existing four digit numbering system for passenger trains by a Five-digit system. Ministry of Railways in an official release stated that the five digit numbering scheme has become necessary in view of the four digit numbering system having got exhausted as the railways run more than ten thousand trains everyday. Only a prefix of numeral “1” will be added to the four digit numbers of the existing trains to make the transition smooth and simple. The new numbering system will enable scientific and logical numbering of all trains on nationwide basis which was earlier confined to express trains only. The new system will come into effect from 20th December this year.