M28 - Cork to Ringaskiddy [advance works ongoing; 2025 start; 2028 completion]

The new junction would be a considerable improvement. Very frustrating if it goes by the wayside. Crazy even.

The junction for Mount Oval could be left open but would require a larger filter lane.

I could see this scheme being changed for the worse and people complaining even more afterwards. The M7 / M20 junction comes to mind.

I have no issue with leaving the Mount Oval slip open.

What would be an absolute disaster would be seeing the Carr's Hill interchange not being upgraded as planned.

It would be much, much more beneficial to everyone than keeping the Maryborough slip open.

I have a fear that I'll informed residents will get their way.

marno21 wrote: »

Is this the on or off ramp for Mount Oval or both they are planning to close?

Realistically as this is a motorway scheme both should be closed and access made via the Carrs Hill interchange

They were planning on closing both, i can see the logic as neither are currently suitable for coming on or off a motorway.

This is pure parish pump politics in action here and no prizes for guessing which political party is being so vocal about it. The motorway to Ringaskiddy from the N40 is paramount and i believe the locals should be told the interchange at Carrs Hill is happening and that is all about it.

marno21 wrote: »

Is this the on or off ramp for Mount Oval or both they are planning to close?

Realistically as this is a motorway scheme both should be closed and access made via the Carrs Hill interchange

The rumour is that motorway restrictions will only start from Carr's Hill onwards.

The residents here are incredibly short minded. The new interchange will provide the old N28 and Maryborough Hill with full access to the M28. In addition, as I've shown in drawings, it could revolutionise access to Grange and Donnybrook from the SRR of the bridge over the Ballybrack stream goes ahead.

Schadenfreudia wrote: »

The residents should be ignored.

I though facilitating driving private cars into town was like, sooo past tense?

People who are well off don't do past tense.

marno21 wrote: »

There are genuinely people that think they are entitled to a slip road from a motorway to their housing estate

Ha. You obviously don't know what you are talking about. But sure a funny image will get you a few thanks anyway. Job done.

AugustusMinimus wrote: »

Thinking about it, there's an easy solution for mount oval.

Close the slip in. However, create a new road, running alongside the motorway from where the slip was to the new Carr's Hill interchange.

This would give Mount Oval full access to the M28 in all directions. It would also give Mount Oval a second entrance/exit and would give it direct access to the old Carrigaline road. It would just do it through Carr's Hill interchange.

Slip on from Marborough Hill will have to close. Can't have 2 slip roads feeding onto the M28 in such little space.

This seems like an answer to me.
Slip on from Maryborough Hill could be sorted the exact same way, have a side-road parallel to the M28 from the various fiefdoms to the Carrs Hill full interchange.

Start with the Carrs Hill full interchange onto N28.
Create road from Maryborough Hill to Carrs Hill interchange, East of N28. (approx 600m two-way).
Roundabout needed on Maryborough Hill for the junction with the new road.
Divert all Maryborough Hill sliproad traffic to Carrs Hill interchange.
Close Maryborough Hill Slip Road.
New road from Mount Oval slip to Maryborough Hill (the new roundabout).
Close Mount Oval slip.
Do the M28 (Finally!)

Is that workable?

hans aus dtschl wrote: »

This seems like an answer to me.
Slip on from Maryborough Hill could be sorted the exact same way, have a side-road parallel to the M28 from the various fiefdoms to the Carrs Hill full interchange.

Start with the Carrs Hill full interchange onto N28.
Create road from Maryborough Hill to Carrs Hill interchange, East of N28. (approx 600m two-way).
Roundabout needed on Maryborough Hill for the junction with the new road.
Divert all Maryborough Hill sliproad traffic to Carrs Hill interchange.
Close Maryborough Hill Slip Road.
New road from Mount Oval slip to Maryborough Hill (the new roundabout).
Close Mount Oval slip.
Do the M28 (Finally!)

Is that workable?

No real need to do a new road to compensate for the removal of the Maryborough slip road.

If people on Maryborough Hill want to access the M28, they can drive up Maryborough Hill a bit and access the M28 via the Carr's Hill junction which will be connected to Maryborough Hill via Maryborough Ridge.

Residents are complaining non stop about this and in reality, not much is changing.

AugustusMinimus wrote: »

Yes. But you are ignoring the fact that there will be a new junction about 500m up the road which will allow you to access both the old Carrigaline Road and Maryborough Hill. It will vastly improved accessibility.

Not ignoring it at all. I just don't see the point in closing an existing road just to up the speed limit from 100 to 120 a kilometre earlier. Seems a waste of money. Money already spent building the existing road I mean. Maybe I am missing some other reason though.

Ludo wrote: »

Not ignoring it at all. I just don't see the point in closing an existing road just to up the speed limit from 100 to 120 a kilometre earlier. Seems a waste of money. Money already spent building the existing road I mean. Maybe I am missing some other reason though.

AFAIK there are certain specifications that have to be conformed with before a road can be designated a motorway.

What i fail to understand is, how come the residents in Mount Oval are not welcoming the removal of this off slip road from the existing N28, surely it will cut down on motorists using their estate as a rat run in the evenings.

But i suppose the old Irish thing of ' once I am alright' is the main thing.

kub wrote: »

AFAIK there are certain specifications that have to be conformed with before a road can be designated a motorway.

What i fail to understand is, how come the residents in Mount Oval are not welcoming the removal of this off slip road from the existing N28, surely it will cut down on motorists using their estate as a rat run in the evenings.

But i suppose the old Irish thing of ' once I am alright' is the main thing.

I lived in Mount Oval for 18 months (renting) and I don't every recall any motorists using it as a rat run (or at least so few that I never noticed them). It's a terrible rat run - huge speed bumps, and a meandering road that won't save you much time because you have to double back to get to any of the other estates nearby. The reason the planners gave for wanting to close it was because they reckoned people would start using it as a rat run rather than go half a kilometer up the road to the new interchange and down around Moneygourney. I'm not convinced myself either way.

Having said that, if I was still living in Mount Oval (which let's not forget has a population comparable to a small town!) the slip road closing would have added a large amount of time to the commute.

Ludo wrote: »

It is human nature to not go beyond your destination and double back. Therefore people won't go to next exit and come back but instead take the rochestown exit and add to the problems there. The extra turning lane for clarkes hill will help but not enough.

No one has said what benefit starting the motorway before the existing exit gives. It is already a dual carriageway with a 100 limit with most people doing over that anyway. Trucks can't get to that speed there as also as it is a a steep hill. So I simply don't see the benefit when it costs nothing to leave the exit as is. Is there some benefit I am missing other than the potential extra 20 know for 500 metres?

I'd say they need the space to add a second lane on the other side if I'm not mistaken? Also the lanes are not separated by a barrier - they'll need space to put that in also. Space all the way up the hill is very constrained - either by existing houses or very steep inclines that will need filling in or leveling.

From Mahon Point, you'd take the Rochestown railway and up Garryduff, same as now.

If this doesn't work for you, perhaps you could be slightly more specific on the route origin/destination?

marno21 wrote: »

The same way you cycle from Mahon Point to Glanmire, using roads which aren't made exclusively for motor traffic

The River Lee is in the way

moyners wrote: »

I'd say they need the space to add a second lane on the other side if I'm not mistaken? Also the lanes are not separated by a barrier - they'll need space to put that in also. Space all the way up the hill is very constrained - either by existing houses or very steep inclines that will need filling in or leveling.

Fair points. The second lane heading towards the n40 being important right.

AugustusMinimus wrote: »

Who wants to have a guess at the re-envisaged scheme. I predict.

1. Mount Oval slip to remain open.
2. Maryborough Hill slip to remain open.
3. Access to Carr's Hill junction from Maryborough Hill to be removed.

Crazy if this happens but I guarantee they'll pander to residents who don't fully understand what they are trying to achieve which is better access to the M28 and better east - west local road access in the area.

This is what i hope will happen, that they will retain everything as originally proposed.
Have the M28 starting from the Carrs Hill interchange.
Have a dual carriageway up to motorway standard but with a 100 kph speed limit on the section from Carrs Hill to Bloomfield (N40).
Retain the existing on and off branches.

So fast forward a few years after this has opened.

Just consider all the traffic now on the 100 kph section, all those container trucks etc.
At the best of times the filter lane onto the existing N28 from Maryborough Hill has a very short and indeed tight filter onto the main road. So it will become more challenging now with all those trucks on the 100kph section of the M28 braking as they do going down that hill.

With regard to the existing exit for Mount Oval, I can picture trucks crawling up the incline in the direction of Ringaskiddy, I am also imaging impatient car drivers going up the outer lane and cutting in to exit at this point.

So in the interests of Road Safety, the NRA will decide eventually to shut these slip roads. Then all and sundry will gladly use the Carrs Hill interchange.

kub wrote: »

This is what i hope will happen, that they will retain everything as originally proposed.
Have the M28 starting from the Carrs Hill interchange.
Have a dual carriageway up to motorway standard but with a 100 kph speed limit on the section from Carrs Hill to Bloomfield (N40).
Retain the existing on and off branches.

So fast forward a few years after this has opened.

Just consider all the traffic now on the 100 kph section, all those container trucks etc.
At the best of times the filter lane onto the existing N28 from Maryborough Hill has a very short and indeed tight filter onto the main road. So it will become more challenging now with all those trucks on the 100kph section of the M28 braking as they do going down that hill.

With regard to the existing exit for Mount Oval, I can picture trucks crawling up the incline in the direction of Ringaskiddy, I am also imaging impatient car drivers going up the outer lane and cutting in to exit at this point.

So in the interests of Road Safety, the NRA will decide eventually to shut these slip roads. Then all and sundry will gladly use the Carrs Hill interchange.

Only one northbound entrance can remain open. Carr's Hill or Maryborough Hill.

Having 2 in such a short space would cause havoc on the dual carriageway. There is literally no reason to maintain Maryborough slip and every reason to have a 4 slip dumbbell at Carr's Hill.

Victor wrote: »

With Tivoli closed to container traffic, there will be a lot more trucks between Douglas and Ringaskiddy.

Will it really make that much of a difference? Don't know the numbers so not sure.
I also hope they address some of the points raised in the consultation report about Coach Hill. This road is totally unsuitable for extra traffic which may use it to get from Rochestown Road to the new interchange. Anyway..plans will be published in 30 mins.

Ludo wrote: »

Update



http://www.n28cork-ringaskiddy.com/Preferred%20Route%20Alignment%20Drawings.pdf

The new Carr's Hill layout is beyond ludicrous.

Instead of having a link road through Maryborough Ridge, the link road will now shoot northwards. Residents will still have to drive as far as before, but now the road is probably less useful as it doesn't align near as nicely with the Moneygurney Road as before.

I have little opinion on the Mount Oval slip. Probably a good thing its being kept open overall.

Ludo wrote: »

I was worried about commenting in case I was completely misunderstanding the drawing. It seems crazy. To be honest the whole thing seems a mess on initial viewing. There is already a road and roundabout ready to be used at Maryborough Ridge which will now sit there forever disused. That new "link road" seems to make no sense.

Its due to Maryborough Hill residents moaning about having to drive up Maryborough Hill to access the Carr's Hill interchange. This new setup is just stupid though.

Can anyone confirm if the drawing is wrong and that the Maryborough Ride link road will also be done ?

Just had a read through the consultation report (http://www.n28cork-ringaskiddy.com/MCT0597Rp0054_Consultation%20Report_Carrs%20Hill%20Interchange_F01_cover.pdf) and in particular the section about Maryborough Ridge. It does make sense actually now having read that and looked closed at it on google maps. If I was living there, no way would I want an access road to/from a motorway to run through the estate I live in. I thought it was cut off from the actual housing estate...but it isn't.