hello again my fodor lifelines
if we decide to drive from Galway to Dublin in one day ,can we be accused of insanity? if so what is a recommended town to overnight?

Not a very hard drive. You are on the N-6 most of the way. I did it once a couple of years ago, Dublin to Galway. Figure on five hours with a stop for lunch along the way. Have fun

I do it all the time. No problem. You can even break up the trip with a stop at Clonmacnoise. They have a nice cafe there and the monastic ruins right on the Shannon River are majestic.

Once you get out of Galway, and before you go into Dublin, it's a fairly easy drive. In perfect conditions, which are rare, it would take less than three hours. I would allow four hours from the centre of Galway to the centre of Dublin (but add a bit if it were time-critical).

On a tourism schedule, I would make time for Clonmacnoise, as IrishEyes suggests. Perhaps also Locke's Distillery at Kilbeggan.

I don't like any town on the route well enough to spend a night there by choice.

The roads have hugely improved in the last few years and I generally do the drive in under 3 hours. It is a motorway or duel carriageway for most of the journey so if you are expecting charming country roads you will be disappointed!

I wouldn't be tempted to break it up with an overnight - I usually just stop for coffee in one of the towns along the way (and still did it in 3 hours at Christmas including a 30min coffee break).