This is an old style fingerpost erected by the AA (Automobile Association). The distance is in miles. The road is the L6. Bilingual direction is given for Áth na gCasán (in Irish), Annagassan (in English) which is in County Louth, Ireland.
<a href="//commons.wikimedia.org/wiki/User:Peter_Clarke" title="User:Peter Clarke">Peter Clarke</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>