M20 Cork–Limerick Motorway

An earlier M20 motorway scheme had reached preferred-route stage in 2010 under the National Roads Authority. Following the November 2010 EU/IMF programme and the 2011 capital review, the project was paused. The 2022 preferred road-based option broadly follows the same corridor as the 2010 scheme.

Then-Taoiseach Leo Varadkar publicly restated that the M20 Cork–Limerick motorway would be built and was a Government priority, reactivating the project after its post-2010 pause. The project was subsequently included as a priority investment in the National Development Plan and Project Ireland 2040.

The N/M20 project team — led by Limerick City and County Council in partnership with Cork City and County Councils and supported by Transport Infrastructure Ireland — opened the first non-statutory public consultation on route options at 12 noon on 19 November 2020. The consultation included rail-based options (use of the existing Charleville–Limerick Junction–Limerick City line at 30-minute frequency; a new line Charleville–Limerick City via part of the Limerick–Foynes line; or a new line Charleville–Killonan Junction via part of the Limerick Junction line) alongside road options.

Project team analysis of TII collision data for 2016–2018 found 87 personal-injury collisions on the N20, of which 7 (8%) were fatal — four times the national fatal proportion of 2%. 13 collisions (15%) caused serious injury and 67 (77%) minor injury. 63% of collisions occurred on rural sections of the N20, compared to a 39% national average for comparable routes. Provisional TII data showed 3 fatal collisions in 2019 and 4 in 2020, above the 2.33/year average for 2016–2018. The corridor has more than 600 access points (private dwellings, farm entrances, side junctions).

Minister for Transport Eamon Ryan TD and Minister of State for Transport Hildegarde Naughton TD announced the Preferred Transport Solution for the N/M20: an 80 km dual carriageway between Cork City and Patrickswell (broadly following the 2010 corridor, reusing 30–40% of the existing N20), bypasses of Mallow, New Twopothouse, Buttevant, Charleville and Banogue, 80 km of new active travel infrastructure, an express bus service with up to 30-minute journey-time savings, and a recommended hourly Cork–Limerick rail service via Limerick Junction with rail-time savings of over 20 minutes. The 500 m wide preferred road corridor was published; final road type (Protected Road vs. Motorway) was deferred to subsequent design.

North Cork IFA held a meeting in Mallow at which farmers raised concerns over the proposed motorway corridor and an associated greenway scheme — severance of land holdings, loss of dairy paddocks, compensation under the IFA/TII roads agreement. This is the first publicly reported IFA-led objection on land take after the 2022 preferred-route announcement.

The N/M20 project team announced that the route will be developed as an 80 km tolled motorway using distance-based barrier-free tolling, with a cost estimate of €2 billion and a stated safety benefit of approximately 70 lives saved over the first 30 years of operation through removal of access points and the introduction of a 120 km/h motorway standard. The project team is led by Limerick City and County Council in partnership with Cork County Council, Cork City Council, TII and the Department of Transport. Letters were issued to affected landowners on 24 June 2024.

Jari Howard, M20 project coordinator, told the Irish Farmers Journal that more than 1,600 farmers in Limerick and Cork will fall within the compulsory purchase universe for the project; letters had been issued on 24 June 2024 with in-person meetings to follow in Limerick and Mallow. IFA Limerick Chair Seán Lavery responded that 'these Limerick and Cork farmers have had a quarter of a century of persecution because of the stop-go process', dating the first M20 proposals to 1998. A subsequent 2026 update by the project team refined the figure to between 210 and 220 landowners with 'very substantial' property impacts.

The Department of Transport and the Department for Infrastructure (NI) published the final All-Island Strategic Rail Review on 30 July 2024. The review made 30 recommendations including doubling current passenger services and high-speed running at up to 200 km/h on the inter-city network, but it did not recommend reopening the historic Cork–Limerick direct line through the Charleville–Limerick gap. Instead it recommends frequency increases on the existing Limerick–Limerick Junction–Cork route, and a chord at Limerick Junction to enable direct Cork–Waterford services. The Limerick–Foynes freight line (separately) is being reinstated under a €151.5 m contract, with track laying complete in May 2024 and commissioning targeted for late 2026.

The Government published Climate Action Plan 2024 on 9 April 2024. The plan retains the statutory transport target of a 50% reduction in transport emissions by 2030 vs 2018 baseline. The Climate Change Advisory Council and the EPA have both published projections showing that almost every sector, including transport, is on a trajectory to exceed its sectoral emissions ceilings for both Carbon Budget 1 (2021–2025) and Carbon Budget 2 (2026–2030); under section 6C(7) of the Climate Action and Low Carbon Development (Amendment) Act 2021, any overshoot in a budget period is carried into the next. This is the live statutory framework against which any new motorway will be assessed.

In a June 2025 update, project coordinator Jari Howard confirmed to The Irish Times that the project business case would be submitted to the Department of Transport for departmental and external review by end-2025, planning permission would be applied for in 2026 (taking approximately a year), enabling works (service diversions) would begin in 2028, and construction would take seven years for full completion in 2035. Howard: 'We plan to begin enabling works in 2028, things like service diversions, and then construction takes seven years, so that gives us a completion date of 2035.' Project remains in Phase 3 (design development) on the TII project framework.

An IFA delegation led by Paul O'Brien (Chair, IFA Infrastructure Project Team), Conor O'Leary (Munster Regional Chair), Louise Crowley (Limerick IFA Chair), Noel Hurley (North Cork IFA Chair), Matt Hurley (Cork Central IFA Chair), Joe Kelly (Munster Regional Executive) and Kevin Kinsella (Infrastructure Adviser) met the M20 project engineering team. The project team reaffirmed the timeline (design 2026, planning 2027, expected approval 2029, construction start 2030, completion 2035) and confirmed that between 210 and 220 landowners would be 'very substantially impacted' — many with severance of farm holdings. O'Brien: 'It is essential that all of the concerns and issues of landowners are fully taken on board.'

An Coimisiún Pleanála granted planning approval (with conditions) for the N6 Galway City Ring Road on 7 April 2026 — roughly 15 years after the first CJEU finding against an earlier iteration of the scheme. The N6 had been initially approved in 2021 only for permission to be quashed after it emerged the climate impact had not been considered against the Climate Action Plan; Friends of the Irish Environment argued the road 'facilitates continued growth in private car use and urban sprawl, locking in long-term carbon emissions'. The Galway pattern is the substantive precedent for any climate-grounds judicial review of the M20.

1. Cork City (Dunkettle / N20 origin)· terminus— Project origin in Cork; ties into existing N20 dual carriageway.
2. Blarney· waypoint— Online section reusing existing N20 dual carriageway between Cork and Blarney.
3. Rathduff· junction— Transport Hub (park-and-ride, EV charging, bike parking) location.
4. Mourneabbey· junction— Transport Hub. End of online section before offline bypass east of Mallow.
5. Mallow (bypass east)· waypoint— Bypassed on a new line east of the town; Transport Hub planned. Mallow is North Cork's principal market town.
6. New Twopothouse (bypass)· waypoint— Bypassed on the new offline section.
7. Buttevant (bypass)· waypoint— Bypassed on the new offline section; Transport Hub planned.
8. Ballyhea· waypoint— Bypassed west of the village on the new line.
9. Charleville (bypass west)· waypoint— Bypassed west of the town; Transport Hub planned. Closest point on alignment to the Charleville–Limerick Junction railway, the rail alternative the project team did not progress.
10. Bruree· junction— Transport Hub planned.
11. Banogue (bypass west)· waypoint— Bypassed west of the village; alignment enters County Limerick south of Croom.
12. Croom (Croom Bypass tie-in)· waypoint— Tie-in to the existing Croom Bypass.
13. Patrickswell (project terminus / M20/N21 tie-in)· terminus— Northern terminus; ties into existing M20 / N21 / Foynes-to-Limerick road network at Attyflin.

1. Cork (Kent) Station· terminus— Existing terminus on the Dublin–Cork main line.
2. Mallow Junction· junction— Existing junction; the Cork–Limerick rail option diverges from the Dublin–Cork main line here.
3. Charleville Station· station— Existing station. The 40 km Charleville–Limerick direct line was closed in the 1960s; the All-Island Strategic Rail Review 2024 did not recommend reopening it.
4. Limerick Junction· junction— Existing junction on the Dublin–Cork main line; the recommended rail solution routes Cork–Limerick via this junction with frequency improvements.
5. Limerick (Colbert) Station· terminus— Existing terminus.

Ireland's Climate Action and Low Carbon Development (Amendment) Act 2021 sets a 51% economy-wide reduction in greenhouse gases by 2030 and statutory five-year carbon budgets, with sectoral emissions ceilings under section 6C. The transport sector ceiling for Carbon Budget 1 (2021–2025) is 54 MtCO2eq and for Carbon Budget 2 (2026–2030) is 37 MtCO2eq, implementing the 50% transport-emissions reduction target in Climate Action Plan 2024. EPA projections (2024) and the Climate Change Advisory Council's Annual Review 2025 both find transport is on a trajectory to exceed its ceilings 'in almost all scenarios'. The N6 Galway City Ring Road's 2021 ABP approval was quashed in part because the climate impact had not been assessed against the Climate Action Plan; the M20 EIAR will be assessed under the same statutory framework. The project team has proposed distance-based barrier-free tolling and seven Transport Hubs as demand-management measures.

Environmental impact assessment not yet published.

TII project coordinator Jari Howard told the Irish Farmers Journal in July 2024 that more than 1,600 farmers in Cork and Limerick would fall within the project's compulsory purchase universe; letters to affected landowners issued on 24 June 2024. A May 2026 update by the project team refined the figure to between 210 and 220 landowners with 'very substantial' impacts, many of whom face severance of farm holdings — dairy paddocks bisected by the new line. Compensation is governed by the IFA/TII national roads agreement; in December 2023 the additional fixed payment per acre for early cooperation was increased from €3,500 to €6,500. The Roads Act 1993 (sections 49–52) governs CPO procedure: the scheme is submitted to An Bord Pleanála / An Coimisiún Pleanála for confirmation with or without modification.

Sponsor mitigation: Underpasses and overpasses to maintain farm connectivity for bisected holdings; IFA/TII roads agreement on land take, injurious affection, severance and disturbance.

TII collision data for 2016–2018 records 87 personal-injury collisions on the N20: 7 fatal (8%), 13 serious injury (15%), 67 minor injury (77%). The fatal-collision proportion of 8% is four times the national figure of 2%. 63% of collisions occur on rural sections, versus a 39% national average. The corridor has more than 600 access points (private dwellings, farm/field entrances, side junctions). The project team's safety case is that grade-separation and access-point removal would save approximately 70 lives over the first 30 years of the new motorway's operation. Provisional 2019 (3 fatal) and 2020 (4 fatal) figures exceeded the 2016–2018 annual average.

The 2020 first non-statutory consultation included rail-based options: increased frequency on the existing Charleville–Limerick Junction–Limerick City line at 30-minute frequency; a new Charleville–Limerick City line using part of the existing Limerick–Foynes line; or a new line Charleville–Killonan Junction using part of the Limerick/Limerick Junction line. The Preferred Transport Solution announced in March 2022 retained only the road plus an 'hourly Cork–Limerick rail service via Limerick Junction' as a complementary recommendation. The All-Island Strategic Rail Review (July 2024) confirmed at strategic level that the historic Cork–Limerick direct line via Charleville will not be reopened; instead frequency upgrades and line-speed improvements on the existing Limerick Junction route are recommended. The corridor's principal inter-city capacity intervention is therefore the M20, not rail.

The 2022 corridor crosses or runs adjacent to multiple watercourses including the River Blackwater (Munster) catchment near Mallow and tributaries of the Maigue. The project team has assembled a multidisciplinary biodiversity / aquatic-ecology team but the Environmental Impact Assessment Report (EIAR) and Natura Impact Statement have not yet been published; they will accompany the 2026 planning application to An Coimisiún Pleanála. Until the EIAR is published the specific SAC/SPA / Annex IV species impacts are not in the public domain, though TII has stated 'thousands of acres' of native planting will form part of the biodiversity mitigation package.

Environmental impact assessment not yet published.

The June 2024 project update gave a central capital cost estimate of approximately €2 billion (price base not formally stated; project team and Irish Times reporting use 'near €2 billion'). The road will be a full motorway with distance-based barrier-free tolling — users pay only for the section travelled — with project coordinator Jari Howard stating that 'the revenue generated by the tolling will help cover the maintenance and renewal of that asset into the future.' Construction funding beyond the design phase has not been formally committed. A 2017 study commissioned by Cork and Limerick Chambers of Commerce estimated the project could support 4,000–5,400 jobs and contribute €128 million to the exchequer.

Establishes a statutory 51% reduction in greenhouse gas emissions by 2030 (vs 2018), a net-zero target by 2050, five-year carbon budgets, and sectoral emissions ceilings under section 6C. Climate Action Plan 2024 implements a 50% reduction target for the transport sector by 2030. Where a budget period is exceeded, section 6C(7) requires the excess to be carried into the next budget — making future ceilings tighter.

If breached: Any new road project EIAR must consider compatibility with the Climate Action Plan; failure to do so was the principal ground on which the High Court quashed the N6 Galway City Ring Road's 2021 ABP approval. Climate-grounds judicial review remains live in 2026.

Any motorway construction is an Annex I project requiring a mandatory Environmental Impact Assessment. The Environmental Impact Assessment Report (EIAR) must describe likely significant effects on population, biodiversity, land, soil, water, air, climate, material assets, cultural heritage and landscape, and the interaction between these factors. Public consultation rights apply throughout.

If breached: Planning consent can be quashed by judicial review; CJEU infringement proceedings against the Member State. Failure to assess climate effects is now a routine ground of challenge after the Galway Ring Road precedent.

Any plan or project not directly connected with the management of a Natura 2000 site, but likely to have a significant effect on it, must be subject to an 'appropriate assessment' of its implications for the site's conservation objectives (Art 6(3)). Where mitigation cannot avoid adverse effects, the project may only proceed under Imperative Reasons of Overriding Public Interest (IROPI), with compensatory measures (Art 6(4)). CJEU Case C-323/17 People Over Wind and Sweetman v Coillte (2018) confirmed mitigation cannot be considered at the screening stage.

If breached: Consent quashed by judicial review; CJEU infringement; the N6 Galway pattern shows ~15 years between initial CJEU finding and final planning approval.

A road authority making a motorway scheme must submit the scheme to An Bord Pleanála (now An Coimisiún Pleanála) for approval (s.49). Compulsory acquisition of land for the scheme is incorporated in the same approval application (s.52). Notice must be served on every owner of affected land; objections and a public oral hearing follow before the Commission confirms (with or without modification) the scheme.

If breached: Failure to follow CPO procedure is a quashable defect; affected landowners retain reference to the Property Arbitrator on compensation.

Public access to information, public participation in decision-making and access to justice in environmental matters. NGOs and members of the public have standing to challenge planning consents for motorway projects on procedural and substantive environmental grounds. Costs protection applies under Article 9(4).

If breached: Aarhus Compliance Committee findings against Ireland (e.g. ACCC/C/2010/54) have driven domestic costs-rule reforms; consent quashable on access-to-justice grounds.

Following the project team's confirmation that more than 1,600 farmers were in the CPO universe and that letters had issued on 24 June 2024, IFA Limerick Chair Seán Lavery told the Irish Farmers Journal that 'these Limerick and Cork farmers have had a quarter of a century of persecution because of the stop-go process' since the project was first mooted in 1998, and that 'even now there is no guarantee this project will be completed by 2031 as planned'. The IFA position is not opposition to the road in principle but a demand for fair compensation under the IFA/TII roads agreement and predictability of process.

On the IFA's May 2026 meeting with the M20 project engineering team, O'Brien stated: 'It is essential that all of the concerns and issues of landowners are fully taken on board.' The IFA delegation focused on the 210–220 'very substantially impacted' landowners — particularly dairy holdings facing severance — and on the implementation of the December 2023 increase in the additional fixed cooperation payment from €3,500 to €6,500 per acre.

Eamon Ryan, while Minister for Transport, told The Irish Examiner in October 2021 that the cost of the Cork–Limerick M20 needed 'careful' scrutiny and previously stated that future governments should look at options for the motorway; the Green Party's preferred 2017 alternative routed inter-city traffic via an upgraded N24 to the M8 at Cahir rather than building a new motorway through North Cork. Ryan also told The Irish Times the Green Party was 'committed to improving safety on the Cork–Limerick N20' but declined to commit to motorway upgrade. By March 2022 Ryan jointly announced the preferred road-based option as Minister for Transport in the FF/FG/Green coalition.

Rail-alternative campaigners welcomed the All-Island Strategic Rail Review's broader Cork connectivity proposals but criticised the omission of any reopening of the historic Cork–Charleville–Limerick direct line — a 40 km gap whose restoration would enable direct Cork–Galway services and reduce the modal-shift case for the M20. The argument is that the rail review and the M20 process advance in parallel without ever forcing a genuine choice between road and rail capacity on the corridor; that the project team in 2022 retained rail only as a complementary 'hourly via Limerick Junction' service; and that this leaves road as the only inter-city capacity intervention.