The A38 in Devon runs between Tamar Bridge outside Plymouth and junction 31 of the M5, where the motorway ends; this section is known as the Devon Expressway. It is mainly a two-lane dual carriageway which runs between Exeter and Plymouth serving as a continuation of the M5 motorway. It is a common route for tourists travelling to Cornwall, though those wanting to use a continuous dual carriageway route to Cornwall can use the A30 rather than the Devon Expressway. It then runs concurrently with the M5 until junction 27, where it splits and enters Somerset independent but parallel to the M5.