For the most part, Swiss road rules are not too different from the UK, apart from the reversed traffic direction and a few peculiar additions. So stay on the right, and overtake on the left. Unless a diamond shaped priority sign is displayed, give way to traffic on the right. Switch off your engines at traffic lights and level crossings to reduce pollution. While you are driving, you are not allowed to use a mobile phone, play with GPS devices, eat or wear headphones that prevent you from hearing emergency services, so pull over before eating your sandwich or putting in directions. The blood alcohol limit is 0.05% for drivers, and even travelling in the same car as a driver who is drunk may cost you your driver’s licence.