R6660 : Northbound M7 at Location E 175.5
taken 6 years ago, near to Castleconnell, Co Limerick, Ireland

Location Reference Indicators (LRIs) are deployed along the Irish National (including motorway) dual-carriageway road network and are very similar, both in design and purpose, to the Driver Location Signs (DLS) used in the UK (eg SE3009 : Driver Location Sign at Bence Lane Bridge). The first line of text displayed on an LRI indicates the road being travelled on (in this example, the M7). The second row indicates the compass direction in which the driver is travelling, which can only be N(orth), S(outh), E(ast), or W(est). The third row indicates the number of kilometres from the beginning of the road. These signs are typically placed on the nearside verge and are positioned at 500m intervals.
So in this instance, we are travelling east on the M7 and are 175.5 km from the end of the motorway.
The N7/M7 route is a national primary road/motorway in Ireland. It runs for 18k km (116 miles), connecting Limerick and Dublin. The majority of the route (between Naas and Limerick) is motorway standard and is designated as the M7 motorway. The road passes through the midlands of Ireland, and acts as a trunk route out of Dublin for the N8 and N9 national primary routes to Cork and Waterford respectively. It forms part of European route E20. The section of the N7 between Naas and the M50 Motorway is the second busiest road in the country with frequent daily tailbacks from the Naas North junction on the southbound side.