At the bottom of the hill, the A40 negotiates another roundabout and becomes an older, narrower road, curving down the last of the slope to run westwards along the seafront, with the shore away to the right, beyond a big car park and a small aquarium called Ocean Lab, and a parade of shops on the left. And then, just ahead, is a roundabout. The sign is green, because we're on the primary route A40, but none of the exits are green, and none of the exits are A40.
The port, our final destination, is just to the right; the A487 towards St David's is to the left. And here, at a dashed white line leading on to a very small grassy roundabout, is the end of the A40. The green signs pointing westwards refer only to Haverfordwest and Fishguard - barely hinting at the route that begins here.
The A40 finds itself here because Fishguard Harbour is here, even though the town it's named for is up at the top of the hill a mile or two east. Goodwick is, rather unfairly, an afterthought to all forms of transport: the A40 is virtually always described as terminating in Fishguard, even though it comes here, and even the railway station, just beyond the terminal roundabout, is called "Fishguard and Goodwick". But it's a nice enough place in its own right, sitting in a sheltered bay between two imposing headlands, with the harbour breakwater stretching out into the Irish Sea and the coastline receding into the distance.
There isn't really much there, all things considered, for the weary traveller who left central London eight hours ago and has driven through the centre of Cheltenham and negotiated the Brecon Beacons to arrive here.
But then, who'd do that?