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     SITE NAME HIGH STREET / SOUTH STREET   SITE NO. 6150  
APPROACH DEFINITIONS  
   
PHASE APPROACHES        
Approach No EXTENDING DETECTORS APPROACH TIMER AND TIMESETTING DEFINITION* SIGNAL GROUP APPROACH EXPIRY (EXPAP) Refer Special Notes  
1 1,2 A11 1        
2 4 A33, B33 2,7 AØ↔BØ      
3 5 A22, D22 2,5 DØ→AØ    
4 6 D11 5      
5 7 B22, C11 3 BØ→CØ    
6 8 B11 6      
7 10 C33, D33 4,8 CØ→DØ    
8 11 C22 4      
9            
10            
11            
12            
13            
14            
15            
16            
       
  *  There are 8 approach timers and 4 approach timesettings available per phase:  
     - Where there are 4 or fewer approaches per phase, allocate one timesetting to each timer.  
       For example: A11. A22, A33, B11, C11.  
     - Where there are more than 4 approaches per phase, two or more timers must have the same timesetting.  
       For example: A11. A21, A32, A43, A54, B11.  
       
SPECIAL APPROACHES        
Approach No EXTENDING DETECTORS APPROACH TIMESETTING SIGNAL GROUP DESCRIPTION Refer Special Notes  
1            
2            
3            
4            
                                         
DESIGNED BY: ANDREW BURUMA (TW)           DATE 26/05/17