N8/N25/N40 - Dunkettle Interchange [under construction]

The lower speed limit should increase the throughput of the junction, not decrease it.

The removal of traffic lights will remove all traffic issues exiting the tunnel.

I THOUGHT the final plan was for two (of the four) lanes coming out of the tunnel would go N25E. The models and pictures haven't really been detailled enough to tell but I think, despite what the awful gantry signs say, that that is to be the case in the final layout.

It makes sense I think. So going into the tunnel coming northbound towards Dunkettle you would have:

Left lane: Slip to Tivoli, N25 east

Right lane: M8 to Dublin, N25 east

At the northern side of the tunnel when it goes to four lanes you would have -

Leftmost lane: Slip to Tivoli

Second lane: N25 east

Third lane: N25 east

Rightmost lane: M8 to Dublin

The N40N to N25E slip is designed with two lanes so this arrangement would make sense to me.

Incredibly dangerous. Those crossings are highly likely to cost lives. Unfortunately with the 3% supported green junta in government this is the type of stupidity you tend to see.

I saw the latest drone footage and my jaw nearly hit the floor. The most dangerous design you'll see Crossings on slip roads ffs.

An underpass would be super-expensive, and present cyclists with steep slopes down and up: the rest of the cycle-lanes are at-grade.

Another option is to raise the crossing so that cars can’t just drive through it - there’s sill plenty of time to get up to the main road’s speed afterwards.

Drawing of alternate route I'm describing:

Yeah its really bad provision. REALLY bad.

TBH I can't see those lights being an issue. I don't think that many pedestrians will use them as not many people walk that way.

And no cyclist in their right mind will come off the bike to go down and use them - they'll just stay on the roundabout.

Yes it is and simple; but you would want it to link up with the other side of the road at some stage; probably via the pre-existing flyover by Little Island train station after going through Eastgate Industrial Estate.

A more direct route with a bridge above the mouth of the tunnel and joining the road in front of the Tunnel Management Building would be even better. It would shorten the journey and be through a less isolated area which would be more attractive, particularly after dark. A bridge would be more expensive but it's the least they could do after the abdication of duty regarding cycling in the junction design.

Movement drawings on the project website seem to have 2 lanes entering the roundabout on that arm. They aren’t the entire length of the slip though. A lane just opens upon roundabout approach.

If the arctic in the photo had come from Little Island and was heading for the N25 Eastbound and got a red light at the pedestrian crossing it wouldn't half screw up the flow on the roundabout.

Got lost on the Dunkettle Interchange for the first time ever. Coming northbound from Mahon and needed to go to Little Island but ended up on the Glanmire Bypass and had to loop back. It’s extremely confusing in that direction at the moment.

Well clearly I’m unbelievably stupid then 🤔

Last time I post here. The signs are very very poor from the Mahon side. One even makes it look like you should drive into the tunnel escape lane.

Media campaign where exactly? I don’t listen to Red or 96 so I have no idea about It.

I’ve seen some drone stuff on here which I can’t follow at all

The slip from city direction onto the M8 if coming from the city is also downright dangerous. It’s way way too short and the traffic moves way too fast towards it. It makes it a horrible merge.

Coming in from Dublin last night cars were also confused and making last minute switch of lane to right or left. It needs more warning ahead of it that the layout has radically changed. It also doesn’t currently have any sign for the city. It mentions N40 only.

The signage is gantries but it’s not that easy to follow and the layout is very confusing at this halfway point .

Glad to hear feedback is welcome though.

Whoever the genius was that decided to reduce the approach lane from the M8 to the tunnel to a single lane in the first place should be fired for gross incompetence.

To do so then with no advance warning until you're almost on top of the split is even more inexcusable.

I am down that way a lot and there's constant last minute dives for the tunnel lane, or chancers skipping the queue and trying to force their way back in at the bollards.

Typical Irish project - all theory and fancy graphics and appeasing of trivial minorities (the Greens in this case) but virtually no relation to reality or how it's going to affect the real world usage.

Every time coming down that road you just know there'll be multiple people in the wrong lane, likely stopped dead in the middle of the road trying to cross the hatching to get into the correct lane...insanity!

Also regarding the single lane for m8 to tunnel, will that only be single lane on completion? If so unsure where they'd fit another lane right now. A lot of the complaints about it are centred on what will be temporary problems, they could hardly keep the previous set up the whole way through the project