5.Other vehicles  219. Emergency and Incident Support vehicles.   You should look and  listen for ambulances, fire engines, police, doctors or other  emergency vehicles using flashing blue, red or green lights and  sirens or flashing headlights, or Highways Agency Traffic Officer and  Incident Support vehicles using flashing amber lights. When one  approaches do not panic. Consider the route of such a vehicle and  take appropriate action to let it pass, while complying with all  traffic signs. If necessary, pull to the side of the road and stop, but  try to avoid stopping before the brow of a hill, a bend or narrow  section of road. Do not endanger yourself, other road users or  pedestrians and avoid mounting the kerb. Do not brake harshly on  approach to a junction or roundabout, as a following vehicle may  not have the same view as you.  220. Powered vehicles used by disabled people.   These small vehicles  travel at a maximum speed of 8 mph (12 km/h). On a dual  carriageway where the speed limit exceeds 50 mph (80 km/h)  they MUST   have a flashing amber beacon, but on other roads you  may not have that advance warning (see Rules 36 to 46 inclusive).  221. Large vehicles.   These may need extra road space to turn or to  deal with a hazard that you are not able to see. If you are following  a large vehicle, such as a bus or articulated lorry, be aware that the  driver may not be able to see you in the mirrors. Be prepared to  highwaycodeuk.co.uk 115  Law RVLR reg 17(1) & 26 