Figures released by the Department for Transport reveal how many seconds drivers will spend at a standstill for every mile they travel on an A road. The data for Devon shows that for every mile on one of the main roads across the area a car will be delayed by 25 seconds. The figures also show motorists drove an average of 33mph in Devon during 2017, despite speed limits ranging between 30mph and 70mph. So for a daily commute of five miles a driver should add around two minutes to the journey to get to work on time. Anyone travelling 20 miles can expect a delay of around eight minutes. The latest statistics, covering 2017, show there has been a slight rise of one per cent on the previous year. But while Devons drivers may get furious about traffic jams, they are actually delayed less than majority of England. England overall has an average delay time of 47 seconds per mile. Queues can be caused by anything from fuel spills, emergency repairs and broken down lorries, to congestion during peak times.