Alternative Signal Sequences And Flashing Signals; Alternative Signal Sequences (Non Uk Only); Wig Wag Signals - Siemens ST950 Handbook

31 A
LTERNATIVE
31.1

Alternative Signal Sequences (Non UK Only)

For the UK, the signal sequences are fixed and cannot be changed.
For non UK use, there are 8 easily definable lamp sequences, with each phase
assigned one of these lamp sequences. Each lamp sequence set defines the signal
states (i.e. colours) for at right of way, at no right of way and the Part-time (standby)
state. It also defines the power on sequence, the signals off to on sequence, the
sequence from normal operation to Part-time and back to normal operation, as well as
the sequences between "at right of way" and "at no right of way". Each sequence can
consist of up to 3 steps where the signal states and times can be specified.
Green must always be used for "at right-of-way" for traffic, pedestrian & green arrow
phases because of the green conflict facility.
31.2

Wig Wag Signals

The Siemens Wig-Wag system is a complete solution for the provision of priority
signals at fire and ambulance stations. The signals may also be used in other locations
such as bridge crossings where there is a need to stop ordinary traffic flow but where it
may be difficult for drivers to forecast when they will be required to stop
In the UK, the ST950LED and ST950ELV Traffic Controllers are approved to both
TR2500A and TR2513A, which allows them to be used at fire and ambulance stations
and at bridges, but not at rail crossings.
The controller can provide stand alone Wig-Wag applications and also full intersections
where Wig-Wags are required nearby.
Both LV and ELV Wig-Wag Signals utilise the latest generation of low power CLS LED
signals. The Siemens Wig-Wag signals are compliant with TSRGD Diagram 3014 and
conform to EN12368. Lamp monitoring is undertaken directly by the controller on both
LV and ELV signals, eliminating the need to fit lamp monitoring equipment within the
Wig-Wag signals, ensuring power usage is kept to a minimum.
IMPORTANT: As Wig-Wag configurations are more complex to create than intersection
configurations it is strongly recommended that they should only be created by
Intersection Engineering at Siemens, Poole.
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Copyright © Siemens plc 2015. All Rights Reserved.
S S
IGNAL EQUENCES AND
Figure 16 – Flashing Red Wig-Wag Signals
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4
Paul Cox
ST950 General Handbook
Mobility Division, Traffic Solutions
Sopers Lane, Poole, Dorset, BH17 7ER
F S
LASHING
Page 88 of 107
Status Issued
Date 16-Jul-2015
Document No. 667/HB/46000/000
Mobility is a division of Siemens Plc
IGNALS