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The N40 road (commonly known as the Cork South Ring Road, or locally the South Ring) is a national primary road in Cork City, Ireland. It is partial ring road skirting the southern suburbs of the city, from the N22 west of Ballincollig, via the Jack Lynch Tunnel under the River Lee, to the Dunkettle Interchange where it meets the N25 and N8/M8. The present N40 designation was created on 23 February 2012 via statutory instrument[1] by renaming parts of the N22 and N25. The N40 serves as both a commuter route and a bypass of the city centre for traffic between parts southwest and east. The National Transport Strategy envisages building a "Cork North Ring Road" to complete the circuit in the 2030s.[2]
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|---|---|
| Bóthar N40 | |
| South Ring Road | |
_-_geograph.org.uk_-_5840857.jpg) | |
| Route information | |
| Part of None | |
| Length | 15.45 km (9.60 mi) |
| Existed | 1995–present |
| History | J6 to J7: 1990 J7 to J9: 1992 J3 to J6: 1995 J9 to J11: 1999 J1 to J3: 2004 J6 flyover: 2006 J3 & J4 flyovers: 2013 J11 freeflow upgrade: 2016 |
| Major junctions | |
           | |
| Location | |
| Country | Ireland |
| Primary destinations |
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| Highway system | |
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The South Ring Road commences at the junction with the N22 at the end of the Ballincollig bypass. The N40 next passes the Curraheen Interchange before meeting the Bandon Road Roundabout, which forms a junction with the N71. This junction also gives access to west Bishopstown. The next exit leads from the Sarsfield Roundabout up to the Wilton Roundabout after passing Wilton Shopping Centre on the left, Cork University Hospital and west Bishopstown.
From there, after passing the exit to Togher/Turner's Cross, The South Ring Road runs east over the Kinsale Road Roundabout by flyover. It also meets the N27 to Cork Airport, Kinsale Road and the N27 South Link Road to the city centre by exiting onto the Kinsale Road Roundabout by slip road.
The South Ring Road continues east, overpassing Douglas and meets the N28 to Ringaskiddy (Carr's Hill) at The Bloomfield Interchange. From here the road passes under the River Lee through the Jack Lynch Tunnel.
North of the tunnel, the South Ring Road ends at the Dunkettle Interchange with the M8 to Dublin via Kildare, Portlaoise, Urlingford Thurles, Cashel, Cahir, Fermoy, Mitchelstown and Watergrasshill the N8 to the city itself, Limerick and Glanmire via the R639 and the N25 to Waterford City via Midleton, Dungarvan and Youghal.
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On 4 August 2006, a 2.5 km (1.6 mi)[citation needed] flyover of the Kinsale Road Roundabout was opened to traffic 6 months ahead of schedule. The project cost 55 million euro and consists of 3 lanes eastbound, 2 lanes west-bound and four on/off-ramps connecting the dual-carriageway to the roundabout.
On 12 March 2010, the NRA confirmed that both the Bandon Road Roundabout and the Sarsfield Road Roundabout would have flyovers built, with traffic travelling on the Cork South Ring Road being able to avoid both roundabouts when staying on the mainline.[3] While minor work on this scheme had already commenced in 2008, full construction started on 6 July 2011 and was completed in July 2013.[4] As well as two flyovers being built, the dual carriageway between both roundabouts will be upgraded and straightened with two access roads being built on either side for local access.
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The latest of many plans to complete the ring road circuit is in the Cork Metropolitan Area Transport Strategy 2040 (CMATS), which envisages a "Cork North Ring Road" running north from Ballincollig to Monard and then east to the M8 near Knockraha.[2] An earlier (2004) proposal ran from Ballincollig to Glanmire.[5] The timeline sees preparatory work in the 2020s and delivery in the 2030s. There could potentially be exits for Glanmire, Mayfield, the completed M20 motorway and Ballincollig with the new Cork North Ring Road.
The current "Cork North Ring Road" is the R635, which under CMATS would become part of a "Northern Distributor Road" running inside the North Ring Road.[2] CMATS also envisages a "Southern Distributor Road" parallel to the middle section of the South Ring Road, intended to take much of the commuter traffic, freeing the ring road for through traffic bypassing the city.[2]
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 | This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. (December 2021) |
| N40 Cork Southern Ring Road | |||
| Westbound exit | Junction | Eastbound exit | |
| Ballincollig (N22) | |
Ballincollig (N22) | |
| Bishopstown (West), Curraheen No Access onto N40 Westbound |  |
Bishopstown, Curraheen | |
| Bandon (N71), Bishopstown | |
Bandon (N71), Bishopstown, Wilton | |
| Doughcloyne, Wilton (R641) (Westward entrance, eastward exit accessed from Junction 3) |  |
Doughcloyne, Wilton (R641) (Westward entrance, eastward exit accessed from Junction 3) | |
| Ballyphehane, Togher (Westward entrance from exit 6) |  |
Ballyphehane, Togher | |
| Cork Airport, City Centre, Kinsale (N27), Turners Cross, Frankfield | |
Cork Airport, City Centre, Kinsale (N27), Turners Cross, Frankfield | |
| No exit |  |
Douglas (West) (R851) (Westward entrance, eastward exit only) | |
| No exit |  |
Douglas (East) (R610) (Eastward exit only) | |
| Carrigaline, Ringaskiddy (N28), Rochestown, Douglas | |
Carrigaline, Ringaskiddy, Rochestown (N28) | |
| Blackrock, Mahon, Mahon Point Shopping Centre (R852) |  |
Blackrock, Mahon, Mahon Point Shopping Centre (R852) | |
| Jack Lynch Tunnel | |||
City Centre (N8), Dublin, Cahir, Mitchelstown, Fermoy, Glanmire (M8  ), Waterford, Dungarvan, Youghal, Midleton (N25 ) |
|
City Centre (N8), Dublin, Cahir, Mitchelstown, Fermoy, Glanmire (M8 ), Waterford, Dungarvan, Youghal, Midleton (N25 ) | |
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