Specifications
4 
On approach 
to signals 
1 2 3
In side road Also variant – 
‘4-WAY CONTROL’ 
Setting up – ‘WAIT HERE’ signs 
Position the signals where needed. For clear visibility of the signal and reliable 
detector operation, there must not be any obstructions between the signals and 
vehicles up to 70 metres away. 
‘WAIT HERE’
1
 signs should be placed before the signal head. If there is a side 
road controlled by portable signals use the ‘3-WAY CONTROL’
2
 sign. 
If there are uncontrolled side roads joining works under signal controlled shuttle 
working, use the two signs
3,4
 in addition to the ‘WAIT HERE’ signs. 
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