AAATHE instance, you want to stop after a side road, do not signal  until you are passing the road. If you signal earlier it may give  the impression that you intend to turn into the road. Your  brake lights will warn traffic behind you that you are slowing  down  You MUST   then pull over and stop as soon as it is safe to do so. Then  switch off your engine.  Law RTA 1988 sect 163  highwaycodeuk.co.uk 59  ● use an arm signal to emphasise or reinforce your signal if necessary. Remember that signalling does not give you  priority.  104. You should also  ● watch out for signals given by other road users and proceed  only when you are satisfied that it is safe  ● be aware that an indicator on another vehicle may not have  been cancelled.  105. You MUST   obey signals given by police officers, traffic officers,  traffic wardens and signs used by school crossing patrols.  Laws RTRA sect 28, RTA 1988 sect 35, TMA 2004 sect 6, & FTWO art  3  106. Police stopping procedures.   If the police want to stop your  vehicle they will, where possible, attract your attention by  ● flashing blue lights, headlights or sounding their siren or  horn, usually from behind  ● directing you to pull over to the side by pointing and/or  using the left indicator. 