Forget the endless stopping and starting, the traffic jams and the right-hand-turn-only lane when you’re desperate to go left what causes drivers the most stress is their passengers writes Geraldine Herbert. 1) The Backseat Driver These are the real experts when it comes to driving and they dispense unwanted but well-intentioned advice at every twist and turn in the road. There is simply no driving experience they have not had regardless of conditions and terrain and don’t get them started on parking. We have noticed that they are rarely in the driving seat themselves. 2) The Boy/Girl Racer Step aside Lewis Hamilton, for this passenger life is not a destination but a journey and one that should be enjoyed at top speed. An amber light at the traffic lights is a signal to accelerate while green lights are an opportunity to demonstrate a car’s 0-100 speed. They will egg you on to overtake or race people off the lights and in extreme cases they will even honk the horn for you. 3) The Screamer You can instantly recognise these passengers by the way they grip the door handle. They spend half the car journey screaming in terror anticipating what other drivers are likely to do and the other half with their eyes tightly shut. Take heart in the fact that even the safest of drivers cannot cure “hysterical passenger syndrome”. 4) The DJ “My car, my rules” is lost on the “DJ”. With the attention span of a 5 year old they change the music or adjust the volume every thirty seconds. Be prepared also for the unwelcome high pitched notes as the journey quickly becomes an in-car karaoke session. Ten minutes “enjoying” the company of the “DJ” will have you searching for the ejector seat button. 5) The Poor Navigator Despite the ease and popularity of google maps and sat nav apps there are still passengers who provide the driver with poor directions. Instructions like “Oh sorry. I think that maybe you should have taken a left there” or “it’s over there somewhere I don’t know exactly where but we’ll find it if we drive around for a while” are really not helpful. 6) The Social Media Addict Never misses an opportunity to document every minor event and update their friends and followers on Twitter, Facebook, Instagram and Snapchat. At...