Major works on the M3 Lagan Bridge will take place over three weekends in August
Belfast City Airport has urged passengers to plan ahead as major works on the M3 Lagan Bridge commence this weekend.
The maintenance scheme will take place over three weekends in August, starting this weekend and in a message to those planning to travel, Belfast City Airport says “passengers are encouraged to plan ahead and allow extra time while diversions are in place”.
According to the Department for Infrastructure, this work will be the third phase of bridge bearing replacements following previous phases in 2024 and 2025. To date 18 bearings have been replaced with a further six now planned, affecting the On and Off Slip Roads on the M3 Bridge.
This latest work is planned over three weekends during August with the first weekend of work starting on Friday 14 August until Monday 17 August. Further work will then take place from Friday 21 August to Monday 24 August; and Friday 28 August to Monday 31 August 2026.
During the three weekends various traffic access restrictions will be in place to the M3 On and Off Slip Roads.
The first weekend road closure will impact the westbound carriageway from 9pm on Friday 14 August 2026 until 6am on Monday 17 August 2026 when the M3 Middlepath Street On-Slip Road (Westbound) will be closed.
Anyone wishing to access the M3 from the city centre will be diverted via A2 Middlepath Street, A2 Bridge End, A2 Ann Street, A2 Victoria Street, A2 Dunbar Link, A2 Great Patrick Street, A2 York Street.
In addition lanes 1 and 2 will be closed west bound with no access or egress permitted to M3 Nelson Street Off-Slip Road (west bound) towards A12 Westlink.
This will mean that anyone travelling on to the M3 directly from the Sydenham bypass towards the Westlink or north or west Belfast, will be unable to exit until the M2 Junction 1 Fortwilliam Roundabout Off-Slip Road where they will be redirected onto M2 Motorway southbound towards Nelson Street for their onward journey.
The second weekend road closure will impact the eastbound carriageway from 9pm on Friday 21 August 2026 until 6am on Monday 24 August 2026.
During this time the M3 Nelson Street On- Slip (eastbound) will be closed and traffic will be diverted via A2 Nelson Street, A2 Dunbar Link, A2 Victoria Street, A2 Waring Street, A2 Albert Square, A2 Donegall Quay, A2 Queen Elizabeth Bridge, A2 Middlepath Street.
The third weekend road closure will impact the westbound carriageway from Friday 28 August until 6am on Monday 31 August when the M3 Middlepath Street On-Slip Road (West Bound) will be closed.
Once again anyone wishing to access the M3 from the city centre will be diverted via A2 Middlepath Street, A2 Bridge End, A2 Ann Street, A2 Victoria Street, A2 Dunbar Link, A2 Great Patrick Street, A2 York Street.
In addition, lanes 1 and 2 will be closed westbound with no access or egress permitted to M3 Nelson Street Off–Slip Road (west bound) toward A12 Westlink.
This will mean that anyone travelling on to the M3 directly from the Sydenham bypass towards the Westlink or north or west Belfast, will be unable to exit until the M2 Junction 1 Fortwilliam Off- Slip Roundabout Off-Slip Road, where they will be redirected onto M2 Motorway southbound towards Nelson Street for their onward journey.
DfI says the works have been carefully planned to take place during weekends in the summer period when traffic volumes are lower than average however some delays can be expected so please allow extra time for your journey or if travelling to the ports or airports.
Diversionary routes will be clearly signed on the approaches to the closure and road users are requested to abide by the temporary traffic management arrangements which are in place for the safety of the public and road workers.
All work is subject to favourable weather conditions.
For traffic information about this and other improvement schemes visit: www.trafficwatchni.com.
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