The 'temporary traffic lights ahead' sign alerts drivers to portable traffic control signals, typically used during roadworks or single-lane closures.
It gives advance warning so drivers can slow down before reaching potentially stopped queues or blind work zones.
What this sign means
The sign displays a traffic light graphic showing red, amber, and green circles within a red warning triangle.
It indicates temporary 2-way or multi-way signals regulating traffic flow around an obstruction or narrow section.
- Red, amber, and green light graphic in a red triangle
- Warns of portable traffic signal controls
- Often accompanied by 'Wait here on red' signs
What to do when you see it
Slow down early, look out for queued vehicles, and prepare to stop cleanly at the 'Wait Here' sign if the signal turns red.
- Reduce speed and be prepared to stop
- Stop at the marked line or 'Wait Here' board on red
- Do not proceed on amber unless unsafe to stop
How this sign is tested
Theory questions focus on UK traffic light sequences and rules governing temporary control setups.
- Recognising standard UK traffic light sequences
- Driver duties at temporary light stop lines
- Hazard perception involving queues near temporary signals
Common mistakes
Jumping a red light because the road ahead appears clear, ignoring the fact that oncoming traffic may have a green phase.
Test yourself on this one
Road and traffic signs is the biggest category in the question bank with 102 questions, and signs turn up inside other categories too. Work through them free, no sign-up needed.
Practise road sign questionsFrequently asked questions
Are temporary traffic lights as legally binding as permanent ones?
Yes. Failing to stop for a red temporary traffic light is a serious driving offence.
Where should I stop at temporary lights?
Stop behind the marked white line or beside the yellow 'Wait Here On Red Signal' board.
What is the UK light sequence for traffic signals?
Red, Red & Amber, Green, Amber, Red.