N8/N25/N40 - Dunkettle Interchange [open to traffic]

I agree, thats what it'll likely be.

As it stands though, both lanes of the south ring can be used to go N40N to N25E. All of the new gantries from Mahon to the tunnel are telling all N25E traffic to get into the left lane only. Thats where I think the chaos will be. That just won't work in the evenings.

Yes, I think that’s mostly right, although access to Little Island by looping back around the roundabout is never going to be encouraged.

I had to draw out my thoughts, because I was writing far too much to explain it in words! So, left is the current arrangement, right is what I think will happen. I think the “fourth” lane (really only a queueing area) will be closed to allow construction of the direct M8 slip-road to begin. In the end, it’s very close to yours.

You’ll still be able to nip onto N8 Cork from Lane 1 at the roundabout (although why avoid the easier free-flow?). Anyone whose muscle memory puts them in the wrong lane for Dublin should be okay; those who end up wrong for N25 can go around the roundabout again.

I think the roundabout will be left in place for a little while so that people can get used to the lane changes.

More gantries up this morning coming along the N25W. I hate them all and they are going to wind me up every morning.. Cluttered, small and I felt, quite unclear.

They also suggest getting into the right hand lane to go to Limerick approaching Tivoli. Unless something will change with lane arrangements later on, this is technically correct, but practically wrong.

The it to the left of the red box (from current roundbout heading east) can close this weekend too can't it? That's where they'll then build the Tivoli to Tunnel link.

With thanks to DroneHawk.

Appears that barriers are being place on the roundabout to divide traffic going to N25 east from traffic going M8 north. This will eliminate potential late weaving to make the new exit.

New camera angle on the dunkettleapp - gives a view of the new road to N25E

Asked this before but any idea on when this project will be finished? To me, it seems they are on the home stretch after the opening of these new link roads. Fair enough there is still a bit to go, but slowly but surely, traffic is taken from the roundabout with each new link opening.

I'd imagine any date offered for completion would be official handover, so all the lanes could be open and operational for months before all the tiding up an landscaping are completed.

I think we’ll likely see most other links open with the next 6 months.

• Remaining slips between dumbbell and mainline
• Revised entry into the tunnel including. N25 west to tunnel slip
• Tivoli to Tunnel loop

The last to open will be N25 west to M8 north. That’ll take significant earth works which at the exit of the tunnel are prob a few months away from even starting.

It's a pity Link B cannot be free flow for now.

Once Link B is free flow it will hopefully ease the northbound congestion a bit.

New.links opening Sunday at 11am according to OH who just past through tunnel a few minutes ago

Would have caused issues where the old slip merged with the N25 mainline. That will be completely reworked with the new links in mind.

That and it would only be generating bad habits for drivers.

I'm wondering about the level differences between the current roundabout and the new tunnel to N25E link (Link A). I think the current drop in level for the new M8 south on approach to the roundabout is very poor. I presume they will alter this as part of the final layout? The contractor will probably have to carry out a large amount of works over the weekend to build some sort of ramp down to the level of the new Link A. But won't the contractor still have to lower the levels under the current N25 overpass to develop a more seamless and gradual drop in levels? How they do this while still allowing traffic to pass will be tricky. I presume single lane closures while they lower the levels?

I was down there: the gradient isn't actually too bad. I was worried about it too, but it looks fine.

Link A has 2 lanes all the way to the N25.

hence I think:

Lane 1: Tivoli, N25 and Little Island

Lane 2: N25 only

Lane 3: M8 only

Lane 4: M8 and Tunnel Management Building