Question Topic: Alertness
The official DVSA guide to driving states:
Use the Mirrors – Signal – Manoeuvre (MSM) and Position – Speed – Look (PSL) routines as you approach the lights. Pay attention to lane markings and get into the correct lane in good time. Keep your speed down and be prepared to stop.
If the lights are showing green, don’t speed up to ‘beat the lights’. Be ready to stop, especially if the lights have been green for some time.