Do NOT ride on the shoulder. That's a horrible idea in Ireland. Ride on the street and people WILL respect you with Hi-Vis clothing on.

edit: Like I said before, most people posting have no experience with an "A" road. That verge is horrible. Hi-Vis backpack and vest with some text to draw the drivers attention.

https://www.google.co.uk/search?biw=....0.xnWE5QtpE0c

That LOMO one is quite good as you look like a worker (but actually moving!)

And ****, it's 30L and £32.99 RRP.