
The table below shows the required locking positions.
A lever number or name followed by 'N' means the lever must be in normal position, followed by 'R' means the lever must be in reversed position.

Lever no. followed by * indicates locking for flank protection or overlap protection. Note that the position of these levers may sometimes be either normal or reverse, but the lever is locked in that position when the signal is cleared.
Signals in opposite direction giving direct access to the route as indicated must always be at danger and are not explicitly listed in the table below. Signals in opposite direction which do not give direct access but must be at danger for overlap protection are included, and are indicated by *.

Column "call on" indicates if the signal can be cleared on occupied track. 
When signal requires 'caution', the signal must be kept at danger until the speed of the train is sufficiently reduced (approx. 10 mph).

------------------------------------------------------------------
Sign|  Route to | Endsignal | Req levers |Call On | Notes
------------------------------------------------------------------
    |           |           |            |        |  
 01 | Up Duplic |    16     |  04N,06R   |        | See Note
    |           |           |            |        |  
    | Up Main   |    17     |  04N,06N   |        | See Note
    |           |           |            |        |  
 02 | Up Duplic |    16     |  04R,06R   |  Yes   |  
    |           |           |            |        |  
    | Up Main   |    17     |  04R,06N   |  Yes   |  
    |           |           |            |        |  
    | Dn Main   |    07     |    04N     |        |  
    |           |           |            |        |  
 03 | Dn Main   |    11     |  04R,06R   |        |  
    |           |           |            |        |  
 05 | Dn Main   |    11     |  04R,06N   |        |  
    |           |           |            |        |  
 07 | Dn Main   |    22     |    08N     |  Yes   |  
    |           |           |            |        |  
    | Dn Duplic |    27     |    08R     |  Yes   |  
    |           |           |            |        |  
 09 |    -      |     -     |11R,12R,13R |        | Dn Main Distant
    |           |           |            |        | via Dn Duplic
    |           |           |            |        |  
 10 |    -      |     -     |11R,14R,15R |        | Dn Main Distant
    |           |           |            |        | via Dn Main
    |           |           |            |        |  
 11 | Dn Main   |     -     |            |        | Requires LC
    |           |           |            |        |  
 12 | Dn Main   |    11     |  04N,08R   |        | Caution if 11N
    |           |           |            |        | See Note
    |           |           |            |        |  
 13 | Dn Main   |    12     |            |        | Caution if 12N
    |           |           |            |        |  
 14 | Dn Main   |    11     |  04N,08N   |        | Caution if 11N
    |           |           |            |        | See Note
    |           |           |            |        |  
 15 | Dn Main   |    14     |            |        | Caution if 14N
    |           |           |            |        |  
 16 |No2 East Sd|    56     |21N,47N,49R |  Yes   | Caution
    |           |           |            |        |  
    |No1 East Sd|    51     |  21N,47R   |  Yes   | Caution
    |           |           |            |        |  
    | Up Main   |    18     |21R,39N,46N,|        | Caution if 18N
    |           |           |    52N     |        | See Note
    |           |           |            |        |  
    | Middle Sdg|     -     |21R,39R,42R |        | Caution
    |           |           |            |        |  
    | Up Branch |    20     |21R,39R,42N |        | Caution if 20N
    |           |           |            |        |  
 17 | Up Main   |    18     |21N,23N,39N,|        | Caution if 18N
    |           |           |  46N,52N   |        | See Note
    |           |           |            |        |  
    | Middle Sdg|     -     |21N,23N,39R,|        | Caution
    |           |           |    42R     |        |  
    |           |           |            |        |  
    | Up Branch |    20     |21N,23N,39R,|        | Caution if 20N
    |           |           |    42N     |        |  
 18 | Up Main   |     -     |            |        | Requires LC
    |           |           |            |        | See Note
    |           |           |            |        |  
 19 |     -     |     -     |01R,17R,18R |        | Up Main Distant
    |           |           |            |        | See Note
    |           |           |            |        |  
 20 | Up Branch |     -     |            |        | Requires LC
    |           |           |            |        |  
 22 | Up Main   |    18     |21N,23R,39N,|        | Caution
    |           |           |  46N,52N   |        | See Note
    |           |           |            |        |  
    | Dn Main   |    40     |  23N,25N   |        | Caution
    |           |           |            |        | See Note
    |           |           |            |        |  
    | Dn Branch |    33     |  23N,25R   |        | Caution
    |           |           |            |        |  
 24 | Dn Main   |    15     |  21N,23R   |  Yes   |  
    |           |           |            |        |  
    | Up Main   |    05     |  21N,23N   |  Yes   |  
    |           |           |            |        |  
    | Up Duplic |    03     |    21R     |  Yes   |  
    |           |           |            |        |  
 26 | Dn Duplic |    13     |25N,28R,29N |  Yes   |  
    |           |           |            |        |  
    | Dn Main   |    15     |    25R     |  Yes   |  
    |           |           |            |        |  
 27 | Dn Main   |    45     |28R,29R,39N,|        | Caution
    |           |           |    41N     |        | See Note
    |           |           |            |        |  
    | Middle Sdg|     -     |28R,29R,39N,|        | Caution
    |           |           |  41R,42R   |        |  
    |           |           |            |        |  
    | Up Branch |    20     |28R,29R,39N,|        | Caution if 20N
    |           |           |  41R,42N   |        |  
    |           |           |            |        |  
    | Dn Branch |    33     |25N,28R,29N |        | Caution
    |           |           |            |        |  
    |No2 West Sd|     -     |  28N,34N   |        | Caution
    |           |           |            |        |  
 30 | Dn Duplic |    13     |  28R,29R   |  Yes   |  
    |           |           |            |        |  
    | Dn Main   |    15     |23N,25N,29N |  Yes   |  
    |           |           |            |        |  
 32 | Dn Duplic |    13     |    28N     |  Yes   |  
    |           |           |            |        |  
 33 |No1 West Sd|     -     |  34N,37R   |        |  
    |           |           |            |        |  
    |No2 West Sd|     -     |    34R     |        |  
    |           |           |            |        |  
 35 | Dn Branch |    26     |    34R     |        |  
    |           |           |            |        |  
 36 | Wallside  |    32     |    34N     |        |  
    |           |           |            |        |  
 38 | Dn Branch |    26     |  34N,37R   |        |  
    |           |           |            |        |  
 40 | Dn Main   |    45     |29N,39N,41N |        |  
    |           |           |            |        |  
    | Middle Sdg|     -     |29N,39N,41R,|        |  
    |           |           |    42R     |        |  
    |           |           |            |        |  
    | Up Branch |    20     |29N,39N,41R,|        |  
    |           |           |    42N     |        |  
    |           |           |            |        |  
 43 | Dn Main   |    30     |39N,41R,42R |        |  
    |           |           |            |        |  
    | Up Main   |    24     |39R,41N,42R |        |  
    |           |           |            |        |  
 45 | Up Main   |    18     |  46R,52N   |        |  
    |           |           |            |        |  
 48 | Up Duplic |    03     |  21N,47R   |  Yes   |  
    |           |           |            |        |  
 50 | Up Duplic |    03     |21N,47N,49R |  Yes   |  
    |           |           |            |        |  
 51 |No2 East Sd|     -     |    54R     |  Yes   |  
    |           |           |            |        |  
    |No1 East Sd|     -     |  54N,52N   |  Yes   |  
    |           |           |            |        |  
    | Up Main   |    18     |  54N,52R   |        |  
    |           |           |            |        |  
 53 | Dn Main   |   67/69   |  46R,52N   |        |  
    |           |           |            |        |  
    | Up Main   |    24     |39N,46N,52N |        |  
    |           |           |            |        |  
    |No1 East Sd|    48     |  52R,54N   |  Yes   |  
    |           |           |            |        |  
 56 |No2 East Sd|     -     |    54N     |  Yes   |  
    |           |           |            |        |  
 57 |No1 East Sd|    48     |  52N,54N   |  Yes   |  
    |           |           |            |        |  
 58 |No1 East Sd|    48     |    54R     |  Yes   |  
    |           |           |            |        |  
    |No2 East Sd|    50     |    54N     |  Yes   |  
    |           |           |            |        |  
 60 | Dn Duplic |    13     |25N,26R,28R,|  Yes   | CallOn for
    |           |           |29N,34N,37N |        | signal 64
    |           |           |            |        | Caution
    |           |           |            |        |  
 61 | Dn Main   |    15     |23N,25R,26R,|  Yes   | CallOn for
    |           |           |  34N,37N   |        | signal 66
    |           |           |            |        | Caution
    |           |           |            |        |  
 62 | Dn Duplic |    13     |28R,29R,30R,|  Yes   | CallOn for
    |           |           |  39N,41N   |        | signal 67
    |           |           |            |        | Caution
    |           |           |            |        |  
 63 | Dn Main   |    15     |23N,25N,29N,|  Yes   | CallOn for
    |           |           |30R,39N,41N |        | signal 69
    |           |           |            |        | Caution
    |           |           |            |        |  
 64 | Dn Duplic |    13     |25N,26R,28R,|        | 
    |           |           |29N,34N,37N |        | 
    |           |           |            |        |  
 66 | Dn Main   |    15     |23N,25R,26R,|        | 
    |           |           |  34N,37N   |        | 
    |           |           |            |        |  
 67 | Dn Duplic |    13     |28R,29R,30R,|        | 
    |           |           |  39N,41N   |        | 
    |           |           |            |        |  
 68 |    -      |     -     |    70R     |        | Dn Main Distant
    |           |           |            |        |  
 69 | Dn Main   |    15     |23N,25N,29N,|        | 
    |           |           |30R,39N,41N |        | 
    |           |           |            |        |  
 70 | Dn Main   |   67/69   |    46N     |        | Caution if
    |           |           |            |        | 69N and 67N
    |           |           |            |        |  

Notes :

Signal 1 :
Lever 1 clears signal 1 red to yellow.
Lever 19 co-operates on signal 1, clearing yellow to green.

Signal 18 :
Lever 18 clears signal 18 red to yellow.
Clearing signal 18 yellow to green is controlled by Villette Road.

Signal 22 :
Caution is not required for signal 22 for the following routes :
 - route is cleared to Up Main through 23R and signal 18 is cleared;
 - route is cleared to Up Main via signal 40
       and signals 40, 45 and 18 are all cleared;
 - route is cleared to Up Branch and signals 40 and 20 are cleared.

Caution is not required for the following routes if signal is
cleared for shunt move only :
 - signal 12 to Down Main with 11N
 - signal 14 to Down Main with 11N
 - signal 16 to Up Main with 18N
 - signal 17 to Up Main with 18N
 - signal 22 to Up Main (via 23R) with 18N
 

Additional locking requirements :

-----------------------
 position  | requires
-----------------------
     21    |   49N     
     25    |   29N      
     29    |   25N     
     47    |   49N     

