In addition to rules applicable for ‘B’, ‘C’ or special class stations as prescribed for single line sections in these rules, the following additional features shall be provided on the sections where twin single line working is adopted -
(a) the station yard situated at both ends and enroute shall be provided with complete track circuiting;
(b) separate single line block instrument shall be provided for each line at block stations and interlocked with their respective Advanced Starters.
(c) the last intermediate starter or starter where no intermediate starter is provided, shall be so interlocked with Advanced Starters that the respective starter or Intermediate Starter signal, as the case may be, can be taken off only after taking off Advanced Starter.
G -BLOCK WORKING