The EIS for the Southern Ring Road suggests that traffic movements at the Rossbrien Junction (this is currently a big roundabout at the end of the Southern Ring Road phase 1, and N20) won't include N20 to Childers Road - which would make it difficult for buses (or anyone else) getting into the city centre from the N20. They'll have to use the Dock Road junction, which will be a pathetic dumbell-type junction; in fact the roundabout on one side will be the existing cement factory roundabout but with two slips added to it. The roundabout on the Dock Road on the other side of the SRR will have the two slips, and the entrance to the Water Treatment plant.
All in all - quite a mess for traffic management in Limerick once the SRR phase 2 opens. The other movement that won't be allowed at Rossbrien (who knows why) will be the SRR phase 1 (i.e westbound N7) to Childers Road.
What will be good is when the new Bus Éireann station is opened on the opposite side of the train station, with buses accessing it directly from the Roxboro road (although this makes the missing N20-Childers Road movement even more mystifying).
Check out the SRR phase 2 EIS non-technical summary
- the restricted movements at Rossbrien are detailed in section 3.2.1 on page 8.