Junction 13 on the Limerick to Galway motorway, (i.e. the Tulla Exit on the Ennis Bypass) is crazy, there is no advance warning of the bad corner, or of the speed limit etc. But that is not the bad part, the dangerous part is that the slip lane before the turn is at most 20 meters long, given that it takes 80+ meters to slow from 120kmph to 50kmph at maximum breaking force, this means that you have to slow down on the motorway. This leads to cars behind you either coming right up your tail, or jumping out into the fast lane without looking properly. There is a huge area of land that was used for the site offices for this section of motorway just at the junction, there is no reason for such a short slip lane.
Joining the motor way at this junction is just as bad, there is a 30 meter slip lane to join, so you come around a bad corner at max 40/50kmph, and have 30 meters to get up to motorway speed. Very bad planning