9.18 Electrically Locked Switches and
Special instructions or instructions posted near the switch
will govern the operation
of switches and derails equipped with electric locks.
To enter a main track within interlocking or CTC limits,
employees must not open the
case door or unlock an electrically locked switch or derail
without track and time or
authority from the control operator. Emergency Release
If the electric lock includes an emergency release, do not
break the seal on the
release or operate the release without permission from the control
operator or train
dispatcher. However, when communication has failed, the seal may
be broken and/or the
- To permit a train to leave the main track.
- To permit a train that has authority to enter the main
track. Train must not enter the
main track until 5 minutes after the seal is broken and/or the
Notify the control operator or train dispatcher when the seal
has been broken and/or
the emergency release operated.
9.23 Suspension of Block System
When authorized, a track bulletin may suspend the block system
or sections of it.
Do not suspend the block system or sections of it until all
trains and control
operators in the affected territory have been notified by track
bulletin specifying the
limits of the suspension.
Track bulletins issued to suspend the block system must not be
delivered to trains
entering the affected territory until the affected limits are
clear of trains, or until
the track bulletin has been transmitted or delivered to all trains
within the limits.
9.23.1 Guidelines While Block System Is
When the block system or sections of it are suspended, the
following guidelines govern:
- Employees must follow rules that apply to nonsignaled
- Trains must receive a track bulletin prescribing speed
restrictions that do not exceed
59 MPH for passenger trains or 49 MPH for other trains.
- Trains will disregard extinguished or illuminated block and
interlocking signals except
- Signals govern movements over railroad crossings at
grade or drawbridges.
- Signals are connected with trackside warning detectors.
Trains must approach the block and interlocking signals
excepted above and each end of
the suspended limits prepared to stop. Trains that leave the
limits and move into block
system territory must move at restricted speed until they reach
the first signal in
service beyond the limits. Signals that govern movement over
railroad crossings at grade
and drawbridges must be regarded as displaying a Stop indication,
regardless of the aspect
displayed, unless the track bulletin specifies that the signals
are in service.
If the crew does not know that signals governing movement over
railroad crossings at
grade are in service, the crew must provide flag protection in
each direction on
conflicting routes before proceeding over the crossing. Crew
members must not rely on time
release or key controller operation as adequate protection while
moving over the crossing,
unless they are instructed otherwise.
- On multiple main tracks, a track bulletin will designate the
track or tracks the block
system is suspended on. A track bulletin that specifies the
track to be used will be
issued to each train.
- Where automatic crossing warning devices have been affected,
action to be taken will be
stated in the track bulletin.
- Dual control switches on the main track will be lined and
locked for main track
movement. Switches equipped with selector levers will be
locked in the HAND position. All
other dual control switches will be spiked. All concerned will
be notified. Until informed
by the train dispatcher, trains must stop and inspect dual
control switches, foul the
circuit, and make sure the switch is properly lined before
passing over it.
A track bulletin must be issued that specifies which position
dual control switches at
the end of double track or multiple main tracks are to be left
If a crew member receives notification from the train
dispatcher of the position of
dual control switches, leave those switches in that position after
- Spring switches that will be removed from service must be
spiked and those concerned
If spring switches are left in service, trains making facing
point movements must be
prepared to stop, unless it is known that the switch is properly
- When the block system has been returned to normal operation,
a track bulletin must
notify all trains within the affected territory before any
train can enter the limits and
be governed by the block system.