not a good sign!
Consider this Dublin road sign for a minute. It is situated at a significant T-junction coming from a road which comes from a major ferry terminal (other than Dublin Port!). Imagine you are a traveller over from Britain in a rented car. You look at your map, and you see that Wexford is located due south of Dublin.....
Note that Dublin drivers are generally reluctant to allow you time to take in all the specific information a sign like this has to offer.
Good luck to you!!!