Traffic under signal control sign

What it means

Traffic on the main road is under signal control.

There may be a junction within a length of road with shuttle working that is not controlled by signals. Signs warn drivers of this.

This sign is for traffic on the side road, so you know the main road is signal controlled.

Where you'll see it

At a side-road junction inside a section of shuttle working.

Rules to know

• There may be a junction within a length of road subject to shuttle working that is not controlled by signals. Signs will warn drivers of this.

  Know Your Traffic Signs, p. 159

Read more

• Traffic lightsThe light sequence, filter arrows and what each light means.

Common mistakes

• Mistake: Assuming the side road has its own signals.

  Instead: Check which signs apply to you and join carefully.

Test yourself

Recalling the answer helps it stick. Pick an answer to see how you did.

Question 1 of 1

What does this sign mean?

• AMain road traffic is under signal control
• BShows the maximum speed advised, in mph, through road works.
• CAn area infected by animal disease
• DAwait the free recovery service after a breakdown

Ready for more? Take the Temporary Signs Quiz