Rule 577 — Optional to 566/567 with System: Work Authority

1. (i)two controlled blocks of the limits; or
2. (a)A train or transfer may be given work authority in writing which permits moving in either direction within specified limits. Before issuing such authority, the RTC must:
3. (i)ensure that there are no other trains or transfers within, or authorized to enter, the required limits, and;
4. (ii)block at Stop all devices controlling signals governing other trains or transfers into such limits.
5. (b)Other trains or transfers may be authorized to work within the limits of one or more trains or transfers authorized to work provided such trains or transfers are restricted on their authority as follows: “Protect against work (number) between (location) and (location)”.
6. (ii)25 miles of the limits when there is no controlled block prior
7. (c)When entry is to be provided by signal indication, the signal may only be requested when the train or transfer is within: The RTC must ensure the authorized train or transfer is the only one which will encounter the signal governing entry into the limits.
8. (d)Trains or transfers so authorized as outlined in paragraph (b) must not enter or move within the working limits until a written understanding has been established with the conductor and locomotive engineer of each train or transfer. This understanding must include information with respect to the intended operation of each train or transfer and remain in place until the affected train(s) or transfer(s) has left the working limits.
9. (e)The RTC must maintain signal blocking against trains or transfers and must not authorize any train or transfer, other than one authorized by Rule 567.3 or as outlined in paragraph (b), to enter the affected limits until the work authority has been cancelled. Each train or transfer must be clear of the affected limits before its work authority is cancelled. EXCEPTION: If the work authority remains to be cancelled to only one train or transfer, it may be cancelled while that train or transfer is within the affected limits. In such case, the conductor or locomotive engineer must inform the RTC of the intended direction of operation. The RTC must maintain signal protection against opposing trains or transfers until the protected train or transfer has cleared the controlled block. The locomotive engineer of a train or transfer so authorized must be made aware of the track limits before moving.
10. (f)Controlled signals within the limits other than the entry and exit signals of the authority that are indicating STOP may be considered as indicating “proceed at RESTRICTED speed”. Not applicable at automatic interlockings or interlockings controlled by a foreign railway. Rule 104.2(b) is not applicable when advised by the RTC that dual control switch(es) are lined for the route to be used.

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