The British drive on the left, and therefore in general, drivers must give way to drivers on the right. Speed limits and distances are in miles per hour (mph). Speed limits are strictly enforced and speed cameras are in use. The speed limit in towns is 30mph, in single carraigeways 60mph and on motorways 70mph.There are severe penalties, including imprisonment, for driving with a blood/alcohol level exceeding 80mg per 100ml. Seatbelts must be worn at all times in both the front and back seats.