N24 - Cahir to Limerick Junction [design and planning underway]

steeler j

https://www.boards.ie/discussion/comment/120161651#Comment_120161651

Bohercrowe to Limerick junction is offline and the section between Limerick junction and monard is very short .I know there is some locals saying it will take 3 years to build and traffic disruptions in the area will for 3 years . The 3 years would be an estimated time for the entire construction of the route , the Limerick junction to monard section would only need a fraction of that time to complete. Most of it is just sepulation until there is a detailed design.

BagofWeed

https://www.boards.ie/discussion/comment/120161765#Comment_120161765

5 roundabouts between the Cashel Rd and Monard ! On an interurban ! How is it other projects on national primary roads don't have these in such a short section ? An extremely underpowered design. Why so many roundabouts and not separated interchanges like other NPR's get ? The proposed road from Bohercrow to Monard will have to cross the existing road 3 times in a very short section guaranteeing traffic disruption during construction all along that stretch. The existing road may well be moved to facilitate the new road meaning even more disruption. A by pass should be just that, a by pass, these plans are basically a relief road like the Inner Relief Frank Drohan Rd in Clonmel.

BagofWeed

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steeler j

https://www.boards.ie/discussion/comment/120167086#Comment_120167086

U have seen the design already ?. No one knows if they are roundabouts , compact gsj or t junctions yet . There may not be 3 crossings ,there may only be 1 crossing of the current road . A parallel road can be build offline first and traffic travel on that while an upgrade of the current is done .

KrisW1001

The only junction that you could definitely say will be a roundabout is the one east of Bansha:

Of course people will complain that this creates a dog-leg in the N24, but my feeling is that the majority of traffic in this area is moving between Bansha and Cahir, with very low traffic levels on the stretch running north of Bansha (the current road is very quiet west of Bansha as it is). Seeing that most drivers want to leave/join N24 at this point, any kind of compact grade-separated junction here would be more expensive and produce worse traffic flow than the roundabout.

Paddico

I would be very surprised if there was any roundabouts.

Still very much in the design phase and free flow is whats always in mind creating these new roads

marno21

https://www.boards.ie/discussion/comment/120182267#Comment_120182267

As per KrisW1001 above, the revised design turns that junction east of Bansha from freeflow on the N24 with a link road to the existing N24 to a new layout with a three arm roundabout, one leg N24 to Limerick, one leg N24 to Cahir and 3rd leg connecting to the existing N24.

I would be incredibly surprised for this project to be anything other than a Tipp Town/Bansha bypass for the time being. It can be revisited with a new link to the N24 at Cahir with a less hostile Minister.

KrisW1001

I see no reason for this to ever be revisited. We need to lose the fetish for free-flow junctions everywhere - this is a low-traffic road, and the majority of traffic here is Bansha-Cahir, so a roundabout makes the most sense. The next most sensible in terms of volume is a Turn-off-to-stay-on (TOTSO) arrangement, with the mainline turning toward Bansha and drivers not wishing to go there must take an exit to re-join N24.

The problem with that second option is that it would cause accidental traffic going through Bansha, defeating the main objective of this scheme, which is to get long-distance traffic out of these two towns.

I expect this to be a 2+2 for the length, with one roundabout east of Bansha, and Compact GSJs for the other junctions. I don’t expect all three junctions around Limerick Junction to end up being built, though. That would be far more than this quiet route will need for decades.

Tipperary Town and Bansha are fairly small settlements, so this road running near to them doesn’t risk it becoming a collector-distributor as could happen near to bigger towns. It's the number of junctions, not the proximity that makes the difference between a good long-distance bypass and a C/D road.

MentalMario

Anybody want to take a guess at how much time this will save compared to the current road?

Say Cahir to Limerick City.

Currently an hour or so. Should it save 20 minutes at rush hour?

touts

https://www.boards.ie/discussion/comment/120208657#Comment_120208657

Middle of the night with no traffic and sticking to the speed limit you would do Cahir to Limerick in 50 minutes.

Middle of the day it all depends on traffic. There is a constant stream of traffic and not a lot of overtaking opportunities so come up behind something slow and you could easily be 1 hr 10min.

If there is anything wrong in Tipperary town you could add another 10 or 15 minutes to that.