Theory revision guide

Traffic Lights & Signals Theory Test Guide

Traffic light questions look simple until filter arrows, amber lights and pedestrian crossings are added in. This page explains the signals in plain English.

Practise traffic signal questionsTake a full mock testView all theory topics

What this topic is really testing

You need to know what each light means, when to stop, when to prepare to move and when a filter arrow gives you permission to go in one direction only.

RedStop and wait
AmberStop unless unsafe
GreenGo only if it is safe

What you’ll be tested on

  • The traffic light sequence
  • Flashing amber at crossings
  • Green filter arrows
  • Signals given by police and traffic officers
  • Reacting safely when lights change
Instructor insight

What I see learners get wrong in lessons

Traffic light questions are easy to underestimate because learners think they already know the sequence.

  • Amber means stop if it is safe to do so, not speed up to beat the lights.
  • Filter arrows and lane signals can apply to one direction or lane, not always the whole junction.
  • Pedestrians, cyclists and blocked junctions still need checking even when the light is green.

Image examples to add

Use the page editor to add four images for this topic. Placeholder cards are shown until you upload the final examples.

Image placeholder 1
Image placeholder 2
Image placeholder 3
Image placeholder 4

The basic light sequence

Red means stop. Red and amber means get ready, but do not move yet. Green means go if the way is clear. Amber means stop unless you are so close that stopping would be unsafe.

  • Do not move on red and amber.
  • Check before moving on green.
  • Treat amber as stop, not hurry up.

Filter arrows

A green filter arrow allows traffic to move in the direction shown. You still need to check that the way is clear and watch for pedestrians or cyclists.

Signals at crossings

At some crossings, a flashing amber light means you may go only if the crossing is clear. If pedestrians are still crossing, wait.

Common mistakes

  • Moving on red and amber instead of waiting for green.
  • Treating amber as permission to speed up.
  • Ignoring a filter arrow direction.
  • Forgetting to check for pedestrians when the light changes.

Real test tips

  • Theory questions often ask what you should do on amber. The safest correct answer is usually to stop if you can do so safely.
  • A green light does not remove the need for observation.
  • Filter arrows apply only to the direction shown.
Practise traffic signal questionsTry a mock test

Can you go on amber?

You should stop on amber unless you are too close to stop safely.

Can you move on red and amber?

No. Red and amber means prepare to go, but you must wait for green.

Next steps

What to do next

Choose the next route based on what is actually holding your theory test preparation back.

If your test is soonFollow the 7-day revision plan instead of jumping between random questions.If you keep failingWork out whether the issue is weak topics, rushed reading, mocks or hazard perception.If you need realistic practiceTake a full mock test and use the result to decide what to revise next.If road signs are weakRevise signs by shape, colour and the action each sign expects from you.If hazard score is lowLearn how developing hazards are scored and practise spotting risk earlier.If you want structureUnlock mock tests, smart revision and dashboard tracking for one simple access period.