How about someone being forthright and actually spelling out what they mean, instead of vague phrasings which don't stand up to any scrutiny..
Is someone coming from northside such as Finglas going to be able to drive through the city centre to the southside in your concept or not?
Are they going to be able to drive to Grafton street \ Stephens green area and join up with vehicles coming from the southside?
And if so, how do you stop them driving on to the southside, as the southside cars do when they leave the area?
The question was asked by
@Gordon Gekko and all there has been on the thread are evasions and vagueness.
"How exactly do you stop people driving across the city without messing with people driving into the city?"
These are basic questions, nobody seems capable of answering, except with more questions, and answers that contradict answers given to earlier questions.
Therefore the reasonable conclusion is that you can't, and it is disingenuous of politicians and those who support such a plan to pretend otherwise.