Traffic Filter Lights A green (arrow) traffic filter light allows traffic to proceed in the direction of the arrow. A directional green filter arrow means that you have priority over traffic as their lights will be on red when you make the turn. As with all junctions be aware of pedestrians and cyclists whilst making the turn. Just because you have priority, there is a possibility of another vehicle, cyclist or pedestrian crossing or being where they shouldn’t be. If you face this situation then you are expected to react in time. It is also relatively common for a learner driver to focus primarily on the red light and not notice the green filter light is illuminated allowing you to proceed. During a driving test, if you have not acknowledged the green filter light for a period of time or the examiner even makes you aware of the illuminated filter, it could go against you in the driving test. A filter light may illuminate before or after the full green phase. Ensure you keep ...