Junctions controlled by traffic lights  175. You MUST   stop behind the white ‘Stop’ line across your side of the road unless the light is green. If the amber light appears you  may go on only if you have already crossed the stop line or are so  close to it that to stop might cause a collision.  176. You MUST NOT   move forward over the white line when the red  light is showing. Only go forward when the traffic lights are green if there is room for you to clear the junction safely or you are taking  up a position to turn right. If the traffic lights are not working, treat  the situation as you would an unmarked junction and proceed with  great care.  177. Green filter arrow.   This indicates a filter lane only. Do not enter  that lane unless you want to go in the direction of the arrow. You  may proceed in the direction of the green arrow when it, or the full  green light shows. Give other traffic, especially cyclists, time and  room to move into the correct lane.  Laws RTA 1988 sect 36 & TSRGD regs 10 & 36  Laws RTA 1988 sect 36 & TSRGD regs 10 & 36  highwaycodeuk.co.uk 93 