 Junction 28 of the M5 lies within the parish of Cullompton and a short distance from the town centre . Other major road links are the A373 to Honiton and the former A38 to Exeter which runs through the town , and is now the B3181 . In 2001 61 @.@ 6 % of people living in Cullompton travelled to work by car or van and 83 % of households had at least one car . In October 1969 a bypass was completed but after only five years this was upgraded to form part of the M5 . Since this time traffic coming from the south of Cullompton to the M5 junction has had to pass through the centre of the town . There are now problems with air quality in the town and Mid Devon District Council have made the whole of the built up area in Cullompton an Air quality management area . Traffic on the exit slip road leaving the M5 northbound often backed up onto the motorway , so the Highways Agency and Devon County Council made junction improvements by widening roads , introducing traffic lights and reopening the left hand lane of the northbound slip road , at a cost of £ 1.3m. This cost was covered by businesses moving to Cullompton . 
