● be prepared to give first aid  ● stay at the scene until emergency services arrive. If you are  involved in any other medical emergency on the motorway  you should contact the emergency services in the same way.  284. Vehicles carrying dangerous goods in packages will be marked  with plain orange reflective plates. Road tankers and vehicles  carrying tank containers of dangerous goods will have hazard  warning plates (download ‘Vehicle markings’).  285. If an incident involves a vehicle containing dangerous goods,  follow the advice in Rule 283 and, in particular  ● switch off engines and DO NOT SMOKE  ● keep well away from the vehicle and do not be tempted to  try to rescue casualties as you yourself could become one  ● call the emergency services and give as much information as  possible about the labels and markings on the vehicle. DO  NOT   use a mobile phone close to a vehicle carrying  flammable loads.  286. If you are involved in a collision which causes damage or injury  to any other person, vehicle, animal or property, you MUST  highwaycodeuk.co.uk 145  6.Documentation 5.Incidents involving dangerous  goods 