AAATHE ● switch on your hazard warning lights  ● leave your vehicle only when you can safely get clear of the  carriageway.  278. Disabled drivers.   If you have a disability which prevents you  from following the above advice you should  ● stay in your vehicle  ● switch on your hazard warning lights  ● display a ‘Help’ pennant or, if you have a car or mobile  telephone, contact the emergency services and be prepared  to advise them of your location.  279. If anything falls from your vehicle (or any other vehicle) on to the  road, stop and retrieve it only if it is safe to do so.  280. Motorways.   On a motorway do not try to remove the  obstruction yourself. Stop at the next emergency telephone and  call the Highways Agency or the police.  281. Warning signs or flashing lights.   If you see or hear emergency or  incident support vehicles in the distance, be aware there may be  an incident ahead (see Rule 219). Police Officers and Highways  Agency Traffic Officers may be required to work in the carriageway,  for example dealing with debris, collisions or conducting rolling  road blocks. Police officers will use rear-facing flashing red and blue  highwaycodeuk.co.uk 143  4.Incidents 3.Obstructions