What Are Wig-Wag Signals?Wig-wag signals are a distinctive type of traffic signal comprising two red lights that flash alternately. Their purpose is to warn drivers of an immediate and often unpredictable hazard, requiring all road users to stop completely before a specific point, such as a barrier or a stop line. They are an absolute stop signal, meaning you must not proceed under any circumstances while they are active, even if you cannot see the reason for the stop.

Where You'll Encounter Wig-Wag Signals

Wig-wag signals are deployed at locations where traffic needs to be halted quickly and irregularly for safety reasons. Common places to find them include:

• Level Crossings: To warn of an approaching train.
• Fire or Ambulance Stations: To allow emergency vehicles to exit safely onto the road.
• Lifting or Swing Bridges: To stop traffic while the bridge mechanism operates.
• Tunnel Entrances: To close the tunnel due to an incident or maintenance.
• Airfields: To control road traffic when aircraft are moving across a road.

These signals are typically activated automatically by an approaching hazard (like a train) or manually by an operator, emphasizing their role in managing non-routine traffic flow.

How to React to Wig-Wag Signals

When you see wig-wag signals flashing, your immediate and unequivocal response must be to stop. This is a legal requirement and a critical safety measure. You must stop behind the stop line or barrier, or if there isn't one, at a point where you can safely see approaching traffic without obstructing the hazard (e.g., the railway line or emergency vehicle exit).

• Stop Immediately: Do not try to rush through or cross the line.
• Wait: Remain stationary until the lights stop flashing completely.
• Proceed Only When Safe: Once the lights are off, proceed only when you are certain it is safe to do so and the obstruction has cleared.

Never assume the signals are faulty or that you can see no danger. The signals are there for a reason, and ignoring them can have severe, even fatal, consequences.

Wig-Wag Signals and Emergency Vehicles

An important rule for wig-wag signals, which differs from some other traffic light scenarios, is that blue light vehicles (emergency services) are not permitted to pass through active wig-wag signals. Unlike certain situations where emergency vehicles might be exempt from traffic light rules, the immediate and severe nature of the hazards protected by wig-wags applies to all vehicles, including ambulances, fire engines, and police cars. This highlights the absolute requirement to stop for these signals.

Wig-Wag Signals in Your Driving Theory Exam

Questions about wig-wag signals frequently appear in driving theory tests. These questions assess your knowledge of:

• Their Meaning: Recognising that they mean an absolute stop.
• Correct Driver Action: What you must do when you see them.
• Locations: Where you are likely to encounter them.
• Safety Implications: The dangers of ignoring them.
• Emergency Vehicle Rules: Understanding that all vehicles must stop.

Misinterpreting wig-wag signals can lead to serious errors in the exam and dangerous situations on the road. Always remember they signify an immediate and mandatory halt.

Key Differences from Regular Traffic Lights

While both wig-wags and regular traffic lights control traffic, there are key distinctions:

• Purpose: Traffic lights manage routine flow; wig-wags manage unpredictable, immediate hazards.
• Colour Sequence: Traffic lights follow a red-amber-green sequence; wig-wags are solely alternating flashing red lights.
• Absolute Stop: Wig-wags always mean an absolute stop for all traffic, without the possibility of filtering or turning on a specific light, which can sometimes occur with green traffic lights. Emergency vehicles stopping is another key difference.

Safety Implications of Ignoring Wig-Wag Signals

Ignoring wig-wag signals is extremely dangerous and illegal. The consequences can include:

• Collision with a Train: At level crossings, this is almost certainly fatal.
• Collision with Emergency Vehicles: Exiting a station at speed.
• Collision with Barrier/Bridge Machinery: Causing damage and potential injury.
• Legal Penalties: Significant fines, penalty points on your licence, or even imprisonment depending on the severity of the offence. Always prioritise safety and adhere strictly to these critical warnings.