Training

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Training
Safety
Proficiency
Block and Interlocking Signals
Proviso Training Center
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Union Pacific Block Signal and Interlocking
Systems

• The purpose of this program is to introduce the
  basic Block Systems and the most common Signals
  that control train movement in main line
  operations.

• You may ask questions at any point during the
  class to help clarify your understanding of the
  material presented.

Block and Interlocking Signals
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9.2.1 Clear

• Proceed at maximum speed

Note Green light on top.

Block and Interlocking Signals
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9.2.4 Advanced Approach
Proceed prepared to stop at the second signal.
Freight trains exceeding 40 MPH must immediately
reduce to 40 MPH .Passenger trains may proceed
but must be prepared to pass the next signal at
40 MPH .

Note Flashing yellow on top.

Block and Interlocking Signals
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9.2.6 Approach
Proceed prepared to stop before any part of train
or engine passes the next signal. Freight trains
exceeding 30 MPH must immediately reduce to 30
MPH .Passenger trains exceeding 45 MPH must
immediately reduce to 45 MPH.

Note Single yellow on top.

Block and Interlocking Signals
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9.2.7 Approach Restricting
Proceed prepared to pass the next signal at
restricted speed, but not exceeding 15 MPH.
Note Yellow over lunar

Block and Interlocking Signals
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9.2.5 Approach Diverging
Proceed prepared to advance on diverging route at
the next signal at prescribed speed.

Note Double yellow.

Block and Interlocking Signals
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9.2.9 Diverging Clear
Proceed on diverging route not exceeding
prescribed speed through turn out.

Note Red over solid green

Block and Interlocking Signals
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9.2.10 Diverging Advance Approach
Proceed on diverging route not exceeding
prescribed speed through turn out and be prepared
to stop at the second signal. Trains exceeding 40
MPH must immediately reduce to 40 MPH .

Note Red over flashing yellow

Block and Interlocking Signals
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9.2.11 Diverging Approach
Proceed on diverging route at prescribed speed
through turn out and be prepared to stop before
any part of train or engine passes the next
signal. Trains exceeding 30 MPH must immediately
reduce to 30 MPH .Passenger trains exceeding 45
MPH must immediately reduce to 45 MPH

Note Red over yellow

Block and Interlocking Signals
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9.2.13 Restricting
Proceed at restricted speed not exceeding
prescribed speed through turn out when applicable.
Note Lunar or Flashing Red

Block and Interlocking Signals
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9.2.14 Stop and Proceed
Stop before any part of train or engine passes
the signal then proceed at restricted speed to
the next signal.

Note Red with number plates
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Block and Interlocking Signals
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9.2.15 Stop
Stop before any part of train or engine passes
the signal.

Note Red without number plates turns a
permissive to a absolute

Block and Interlocking Signals
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Now that you have seen the various signals and
aspects that is currently in use on the Union
Pacific well demonstrate their use in the
different block systems in operation on the
railroad. We will show how trains and people
effect the signals in their daily operation.

• ABS Automatic Block System
• CTC Centralized Traffic Control

Block and Interlocking Signals
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Proceed prepared to stop at next signal not
exceeding 30 MPH.
Stop and Proceed at restricted speed to the next
signal
Proceed at maximum speed
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112
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Automatic Block Signal System (ABS) A series of
consecutive blocks governed by block signals, cab
signals, or both. The signals are activated by a
train or by certain conditions that effect the
block use.
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• 9.16 Stop and Proceed Indication
• At a signal displaying a Stop and Proceed
  indication, the train will be governed as
  follows
• The train must stop, then proceed at restricted
  speed.
•     or
• 2. The train may pass the signal at
  restricted speed without stopping to do any of
  the following
• e. Continue movement when proceeding at
  restricted speed due to rule or previous signal
  indication.

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Equipment effects the aspect of signals
Throwing a switch effects the aspect of signals
Any break in the loop will have an effect on
signal aspect.
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Automatic Block Signal System (ABS) A series of
consecutive blocks governed by block signals, cab
signals, or both. The signals are activated by a
train or by certain conditions that effect the
block use.
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Dispatchers can effect the aspect of signals at
control points
STOP!
Dispatcher
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114
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Centralized Traffic Control (CTC) A block system
that uses block signal indication to authorize
train movements.
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• 10.1 Authority to Enter CTC Limits
• CTC limits are designated in the timetable.
  Sidings within CTC limits are controlled sidings
  and are governed by CTC rules. A train must not
  enter or occupy any track where CTC is in effect
  unless
• A controlled signal displays a proceed
  indication. or 
• Verbal authority is granted as follows
• The control operator authorizes movement past a
  Stop indication under Rule 9.12.1 (CTC
  Territory).
• The control operator authorizes the train to
  enter tracks between block signals by stating,
  "(Train) at (location) has authority to enter
  (track) and proceed (direction)." After entering
  the track, the train is authorized to move only
  in the direction specified.
•       or
• - The control operator grants track and time
  under Rule 10.3 (Track and Time).

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Controlled SignalAn absolute signal controlled
by a control operator. Control PointThe
location of absolute signals controlled by a
control operator.
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Union Pacific Block Signal and Interlocking
Systems

• This concludes the basic guidelines concerning
  the Block Systems and the most common Signals
  used by Union Pacific Railroad that control train
  movement in main line operations.

• Thank You for your attendance today and if you
  have any more questions please ask.