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You are in the left-hand lane at traffic lights. You are waiting to turn left. At which of these traffic lights must you NOT move on?

A 1212

At some junctions there may be a separate signal for different lanes. These are called ‘filter’ lights. They’re designed to help traffic flow at major junctions. Make sure that you’re in the correct lane and proceed if the way is clear and the green light shows for your lane.

Related Information

Filter lights are a great tool for managing traffic flow at busy junctions. They are designed to help drivers navigate these complex intersections safely and efficiently, allowing them to move quickly through the junction without having to worry about conflicting signals from other lanes.

The filter light system works by giving each lane its own signal, which is green when it’s clear for that lane and red when the way isn’t safe or open yet. This helps prevent confusion between different lanes of traffic as well as reducing delays caused by conflicting signals from multiple directions. It also means that drivers can be sure they’re in the correct lane before proceeding forward with their journey.

Overall, filter lights provide an effective solution for managing congested junctions while keeping everyone on the road safe at all times - so it pays off to make sure you know what signal your particular lane has! By following this simple advice, you can ensure smooth driving through any intersection equipped with filter lights!



3 years ago

I love its graphics


3 years ago

This app helps me learn whilst being free. I can learn my weaknesses and aim to pass at higher score


3 years ago

Helping my daughter with the theory side of the test. Only wish we’d found it earlier on! Even I’m learning/getting reminded of what things mean again!

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