INTERMEDIATE BLOCK SIGNAL (GR 3.75)

INTERMEDIATE BLOCK SIGNAL (GR 3.75). IB SIGNAL IS PROVIDED TO DIVIDE A LENGTHY BLOCK SECTION INTO TWO SECTIONS. PROVISION OF IB SIGNAL INCREASES THE SECTION CAPACITY. IB SIGNAL IDENTIFIED BY IB BOARD ON SIGNAL POST. TELEPHONE IS PROVIDED ON SIGNAL POST FOR COMMUNICATION WITH REAR SM DURING SIGNAL FAILURE..

PASSING IB SIGNAL AT ON (3 SITUATIONS). WHEN SM IS AWARE OF IB SIGNAL FAILURE. WHEN LOCO PILOT FINDS IB SIGNAL IN ON CONDITION AND CONTACTS SM IN REAR THROUGH SIGNAL POST TELEPHONE. WHEN LOCO PILOT FINDS IBS IN ON CONDITION AND PHONE OUT OF ORDER..

SM SHALL STOP THE TRAIN AT STATION. SUSPEND IB WORKING AND TREATS ENTIRE SECTION AS ONE BLOCK SECTION. SM SHALL ISSUE PLCT(T/C 1425 (UP),T/D 1425(DOWN) DULY AUTHORISING LP TO PASS LSS & IB SIGNAL( SEPARATE T/369 (3B) WILL NOT BE ISSUED TO PASS IBS AT ON(ITEM NO 36,AS-16 OF G&SR)..

WHEN LP FINDS IB SIGNAL AT ON. LP SHALL STOP THE TRAIN IN REAR OF IB SIGNAL. LP HAS TO CONTACT REAR SM THROUGH SPT PROVIDED ON IBS POST. IF SM INFORMS ABOUT TRAIN AHEAD IN SECTION LP SHALL WAIT AND PROCEED FURTHER AFTER TAKING OFF IB SIGNAL. IF IB SIGNAL IS FAILED SM WILL AUTHORIZE LP TO PASS IBS AT ON DULY ISSUING PRIVATE NUMBER AFTER ENSURING LC HAS BEEN OBTAINED FROM SM IN ADVANCE. LP SHALL RECORD PN AND PROCEED FURTHER..

WHEN LOCO PILOT FINDS IB SIGNAL AT ON AND TELEPHONE OF IB POST IS OUT OF ORDER.

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