Interlocking and Control Point rules apply to any movement within
interlocking limits or at a controlled point. These rules cover the
use of signals and appliances, movement within and through
interlockings and controlled points, dangerous conditions, and the
closing of interlocking stations.
600. Clearing of Interlocking and Controlled
Interlocking and controlled point signals
govern the use of the routes of an interlocking or controlled point.
These signals must be cleared sufficiently in advance of approaching
trains to avoid delay.
601. Interlocking and Controlled Point
Signals, Interlocking Appliances: Operation, Repair, Malfunction
Interlocking signals, controlled point signals,
and interlocking appliances must be operated only by those charged
with operating them. When these devices are undergoing repair, or
when any irregularly affecting their operation is detected, two action
must be taken:
- Stop Signals must be displayed and blocking
devise applied to all affected signals and interlocking appliances,
- Defects must be reported promptly to the
Dispatcher and the Signal Maintainer.
Signals must remain in Stop position and block
devices applied until the Signal Maintainer has reported that:
- Repairs have been completed, and
- Interlocking appliances are properly lined for
movement, when repairs were performed on interlocking appliances.
602. Interlocking or Controlled Point
Signals: Rerouting Trains
When an interlocking or controlled point signal
has been cleared for an approaching train, the signal must not be
changed to Stop position until:
- The train has been stopped, or
- The Engineer has been informed of the
situation and has advised the Dispatcher or Operator that he can
stop before reaching the signal.
EXCEPTION: In an
emergency, the signal may be immediately changed to Stop position.
Before changing the route, the Dispatcher or
Operator must determine that the train has stopped, and must attempt
to contact the Engineer to inform him that the route is being changed.
603. Interlocking Appliances: Control
Control mechanisms that operate an interlocked
appliance must not be operated when any portion of a train is standing
on or closely approaching the appliances.
604. Interlocking Appliances: Locking
If impossible to lock an interlocking
appliance, two actions must be taken:
- All controlled mechanisms must be placed in
the required position and blocking devices applied, and
- All affected appliances must be properly
lined, and spiked or wedged.
EXCEPTION: If the
interlocking appliance is dual controlled, it must be properly lined
and locked manually.
The Dispatcher or Operator must not give a
train permission to pass a Stop Signal until the two above
requirements are met.
605. Movements That Might Not Shunt
Train movements that might not shunt track
circuits must be made on signal indication. Track car movements may
be made on signal indication except for routes that lead to ABS or DCS
territory. Before permitting train and track car movements of these
kinds, the Dispatcher or Operator must ensure that all interlocking or
controlled point appliances are properly lined and secured with
blocking devices. Only those blocking devices applied to protect
track car movements entering ABS or DCS territory will be recorded and
reported to the Dispatcher.
After the equipment has entered interlocking
limits, the home signal, if displayed, must be set to display Stop
Signal and secured with a blocking device. Thereafter, the Dispatcher
or Operator must not remove the blocking devices protecting any
portion of the affected route until the employee in charge of the
equipment has reported clear of the opposing signal governing that
portion of the route.
The employee in charge of the equipment must
notify the Dispatcher or Operator when the movement is clear of
606. Rust on Rails or Wheels
If rails are rusted or cars have been left
standing and wheels are rusted, crew members must confer with the
Dispatcher or Operator. Interlocking appliances must not be operated
until movement has been completed. Interlocking control mechanisms
must be blocked with blocking devices. These blocking devices need
not be recorded nor reported to the Dispatcher.
If rails are rusted, Signal Maintainers must
notify Dispatchers and Operators on the prescribed form.
607. Railroad Crossings at Grade
Engines or cars must not be left within the
limits of interlocked railroad crossings at grade.
608. Delay in an Interlocking
If a train has passed an interlocking signal
and is delayed, it must proceed at Restricted Speed. If the track is
seen to be clear to the next signal, and the next signal indicates
proceed, then the train may be operated in accordance with the last
signal indication received. In cab signal territory, the train may
proceed in accordance with cab signal indication.
609. Interlocking or Controlled Point Signal
Changes to Stop
If a signal aspect permitting a train to
proceed changes to Stop Signal before it is reached, the stop must be
made as soon as safe handling will permit. Such signal changes must
be reported to the Dispatcher.
610. Stopped in an Interlocking by Dispatcher
If the Dispatcher or Operator stops a train
while it is moving through an interlocking, the train must not move in
either direction until it has received the proper signal or permission
from the Dispatcher or Operator.
611. Stop Less than One Engine Length beyond
If a train stops less than 1 engine length
beyond an interlocking signal, it must not proceed without permission
of the Dispatcher or Operator.
612. Reversing Direction within an
To reverse direction within the limits of an
interlocking, trains must have either:
- Proper interlocking signal, or
- Permission of the Dispatcher or Operator.
When permission is given, the route must not be changed until it is
known that the movement has been completed.
613. Movement Not Governed by Fixed Signal
Movements not governed by fixed signal
indication within interlocking limits must receive permission from the
Dispatcher or Operator. Movement may then proceed at Restricted Speed
to the next signal. In cab signal territory, trains may proceed in
accordance with cab signal indication after clearing interlocking
614. Derailment or Damage
If there is a derailment or if any damage
occurs to the track or interlocking, two immediate actions must be
- Stop Signals must be displayed and blocking
devices applied to the controls of all interlocking signals and
appliances that may be affected, and
- The Dispatcher must be notified.
No movement may be permitted until all parts of
the interlocking and track that may be damaged have been inspected and
are confirmed safe for the movement.
615. Dangerous Conditions or Obstructions
If a train passes an interlocking station with
any indication of conditions dangerous to itself or to a train on
another track, or if the Dispatcher or Operator is informed of any
obstruction in a block, two actions must be taken:
- An attempt must be made immediately to stop
any train involved, and
- The Operator or Dispatcher controlling the
next interlocking, controlled point or TBS must be notified.
Each Operator or Dispatcher must display Stop
Signals to all trains that may be endangered. A train may be
permitted to proceed at Restricted Speed after the crew has been
informed of the situation.
616. Interlocking Station Closed
When an interlocking station is closed, routes
and signals must be set to comply with instructions of the
Dispatcher. The station building must be secured.