The A7 is a short road in east County Down. Interestingly it is the only single-digit A-road in Northern Ireland that does not connect to another.
It starts at a roundabout in Carryduff, where it turns off the A24 from Belfast. The road then heads southeastwards to Saintfield where it becomes the dominant number in a short multiplex with the A21 as far as a set of traffic lights in the centre of town.
The next few miles are more-or-less straight as the road crosses the fields to Crossgar where it meets its namesake B7. The road leaves town as Downpatrick Road, showing its final destination. It crosses the River Quoile and enters Downpatrick, ending at a roundabout on the A25 to the north of the town centre.