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Discover Roadworks in Your Area
N.B. The map and table below provide the location of ALL roadworks being carried out within the Sizewell C area, not just works being carried out by Sizewell C.
Please hover over or click on the activity icons for further information.
List of Roadworks
The table below shows roadworks and road closures within the Sizewell C area.
This information was last updated on 4th September 2026 03:44:41 AM
Location | Description | Traffic Management | Start Date | End Date | Responsibility |
|
Wentworth Road |
Network Operations Faults: Essential overhead line works / pole replacement to ensure safe and reliable power supplies: EXCAVATIONS FOR FAULT REPAIRS, DIGGING IN THE FOOTWAY, FOOTWAY CLOSED AND CROSSING POINTS OUT FOR PEDESTRIANS, SPOIL IN THE CW AND ALSO A ROAD CLOSURE IS IN PLACE |
3 September 2026 |
7 September 2026 |
UK Power Networks |
|
|
Haylings Grove |
Urgent work due to possible loss of gas supply |
3 September 2026 |
11 September 2026 |
Cadent |
|
|
High Street |
LEISTON 1454269 - Overlay – Lay approx 5m of Duct 54/56 in verge / footway to link existing BT Boxes to facilitate spine cabling works. |
Traffic control (two-way signals) |
8 September 2026 |
11 September 2026 |
BT |
|
Roberts Road |
CARRIAGEWAY REPAIRS - SINK HOLE |
20 August 2026 |
18 September 2026 |
Suffolk County Council |
|
|
Thorpe Road |
TM for safe access and egress of plant to Crossing Point 3&4. |
Traffic control (multi-way signals) |
1 September 2026 |
4 October 2026 |
East Anglia Two |
|
Thorpe Road |
Remedial works to complete road signage and high friction surfacing |
Traffic control (multi-way signals) |
1 September 2026 |
5 October 2026 |
East Anglia Two |
|
Victoria Road |
Excavation required to provide telecoms/fibre services for customer. |
8 September 2026 |
11 September 2026 |
BT |
|
|
Minsmere Road |
clean jet and investigate 1 asset causing flooding |
7 September 2026 |
7 September 2026 |
Suffolk County Council |
|
|
Abbey Road |
Sizewell C – SZC0762
BBR - Installation of level crossing corner bases and hardstands Installation of
level crossing corner bases and hardstands involves excavation, construction of
concrete foundation bases, placement of compacted hardstanding material, and
associated civil works to support level crossing equipment and safe maintenance
access.
02/09/2026 - 16/09/2026
Alternate lane closures based on what side of LX we are working on
To utilise Jacksons open TM agreement |
Traffic control (two-way signals) |
23 August 2026 |
18 September 2026 |
Sizewell C |
|
High Street |
Excavation required to provide telecoms/fibre services for customer. |
8 September 2026 |
11 September 2026 |
BT |
|
|
High Street |
Excavate on existing boundary box to renew boundary box. |
2 September 2026 |
9 September 2026 |
Essex And Suffolk Water |
|
|
The Street |
WESTLETON V28014 - Build 1 D144559 - Overlay – Lay approx 80m of Duct 54/56 in verge / footway to link existing BT Boxes to facilitate spine cabling works. |
Traffic control (multi-way signals) |
26 August 2026 |
9 September 2026 |
BT |
|
Minsmere Rise |
WESTLETON V28014 - Build 1 D144559 - To build new verge / footway / carriageway joint box and lay approx 180m of Duct 54/56 in |
26 August 2026 |
9 September 2026 |
BT |
|
|
Yoxford Road |
SZC - 0654 - YOXFORD 1391043 - Traffic Management to enable completion of Openreach connection & redistribution works. |
Traffic control (two-way signals) |
23 August 2026 |
7 September 2026 |
BT |
|
Eastbridge Road |
Sizewell C – SZC0729
Veg clearance
2 way lights (B1122)
Road closure (Eastbridge Road – from junction with B1122 to Abbey Cottage)
Road closure progressed under Article 19
Monday-Friday 20:00pm -05:00am
Only one set of signals up on B1122 at any one time – to be coordinated with Jacksons |
6 September 2026 |
11 September 2026 |
Sizewell C |
|
|
High Street |
Excavate on existing boundary box to renew boundary box. |
6 September 2026 |
11 September 2026 |
Essex And Suffolk Water |
|
|
Eastbridge Road |
Sizewell C – SZC0729
Veg clearance
2 way lights (B1122)
Road closure (Eastbridge Road – from junction with B1122 to Abbey Cottage)
Road closure progressed under Article 19
Monday-Friday 20:00pm -05:00am
Only one set of signals up on B1122 at any one time – to be coordinated with Jacksons |
Traffic control (two-way signals) |
6 September 2026 |
11 September 2026 |
Sizewell C |
|
Abbey Road |
Sizewell C – SZC0729
Veg clearance
2 way lights (B1122)
Road closure (Eastbridge Road – from junction with B1122 to Abbey Cottage)
Road closure progressed under Article 19
Monday-Friday 20:00pm -05:00am
Only one set of signals up on B1122 at any one time – to be coordinated with Jacksons |
Traffic control (two-way signals) |
6 September 2026 |
11 September 2026 |
Sizewell C |
|
Middleton Moor |
Sizewell C – B1122 Early Years
Road improvements including vegetation clearance, new footpath construction, carriageway resurfacing and signage installation.
Works undertaken with nighttime closures of the B1122 and diversions along the B1122, B1069, A1094 and A12 (and vice versa).
The road closure will be progressed under an Article 19 application.
Mon-Thursday nights 20:00 to 05:00 |
31 August 2026 |
23 October 2026 |
Sizewell C |
|
|
Yoxford Road |
Sizewell C – B1122 Early Years
Road improvements including vegetation clearance, new footpath construction, carriageway resurfacing and signage installation.
Works undertaken with nighttime closures of the B1122 and diversions along the B1122, B1069, A1094 and A12 (and vice versa).
The road closure will be progressed under an Article 19 application.
Mon-Thursday nights 20:00 to 05:00 |
31 August 2026 |
23 October 2026 |
Sizewell C |
|
|
Reckford Road |
Build verge chamber and access 1 x chambers for rodding and roping - verge |
Traffic control (two-way signals) |
10 September 2026 |
15 September 2026 |
Virgin Media |
|
Reckford Road |
Build verge chamber and access 2 x chambers for rodding and roping |
Traffic control (two-way signals) |
10 September 2026 |
15 September 2026 |
Virgin Media |
|
Station Road |
Complete tie in of 10" Cast with 315mm PE |
31 August 2026 |
20 September 2026 |
Cadent |
|
|
Snape Road |
1. A two stage junction ensuring that Snape Road traffic streams can run simultaneously.
2. Vehicle Actuation introduced at side roads to ensure consistent application of max green times.
3. Max green for side roads to be to be peak hour specific adjusted to 10 seconds AM and 10
seconds PM.
4. Maximum permitted max green times for Snape Road of 60 seconds.
30MPH speed restriction |
Traffic control (two-way signals) |
27 July 2026 |
17 December 2027 |
Suffolk County Council |
|
Grove Road |
A three-stage junction ensuring that Grove Road traffic streams can run simultaneously, Access 11&12 can run simultaneously. (Previously Access 11&12 had run independently due to width constraints when constructing the haul road.)
An ‘all red’ period to permit pedestrians to cross Access 12. This is a safety measure to mitigate the event of vehicles turning into Access 12 in error. Max green for side roads to be to be peak hour specific adjusted to 20 seconds AM & 20
second 30MPH speed restri |
Traffic control (two-way signals) |
27 July 2026 |
17 December 2027 |
Suffolk County Council |
|
Buckleswood Road |
Sizewell C –SZC0697
Buckleswood Road Lane Closure under two way signals to undertake level
crossing works including the installation of new foundations and gate equipment
to support the upgraded crossing infrastructure.
Foundation works typically consist of excavation, formation preparation,
reinforcement installation, concrete pours, and installation of specialist bases for
barriers, gates, LOC equipment, signage, and associated systems.
Lane closure to commence 20/07/2026 06:00hrs to 07/08/202 |
Traffic control (two-way signals) |
16 August 2026 |
11 September 2026 |
Sizewell C |
|
Footway Outside No 16 Round To No 36 Paxton Chadwick Close |
ABANDON 6" SI & REPLACE 75MM PE. APPROX 8 SERVICES. |
13 August 2026 |
10 September 2026 |
Cadent |
|
|
Paxton Chadwick Close |
ABANDON 4" SI & REPLACE 180MM PE. APPROX 40 SERVICES. |
13 August 2026 |
10 September 2026 |
Cadent |
|
|
Sizewell Road |
CONNECTION |
Traffic control (multi-way signals) |
17 August 2026 |
9 September 2026 |
Cadent |
|
Sylvester Road |
ABANDON 4" SI & REPLACE 90MM PE. APPROX 50 SERVICES. |
3 August 2026 |
14 September 2026 |
Cadent |
|
|
Arnhem Road |
ABANDON 6" SI & REPLACE 125MM E. APPROX 10 SERVICES. |
3 August 2026 |
14 September 2026 |
Cadent |
|
|
Seaward Avenue |
ABANDON 4" SI & REPLACE 90MM PE. APPROX 100 SERVICES. |
27 July 2026 |
11 September 2026 |
Cadent |
|
|
Grove Road |
A three-stage junction ensuring that Grove Road traffic streams can run simultaneously, Access 11&12 can run simultaneously. (Previously Access 11&12 had run independently due to width constraints when constructing the haul road.)
An ‘all red’ period to permit pedestrians to cross Access 12. This is a safety measure to mitigate the event of vehicles turning into Access 12 in error. Max green for side roads to be to be peak hour specific adjusted to 20 seconds AM & 20
second 30MPH speed restri |
Traffic control (two-way signals) |
21 June 2026 |
17 December 2027 |
Suffolk County Council |
|
Snape Road |
1. A two stage junction ensuring that Snape Road traffic streams can run simultaneously.
2. Vehicle Actuation introduced at side roads to ensure consistent application of max green times.
3. Max green for side roads to be to be peak hour specific adjusted to 10 seconds AM and 10
seconds PM.
4. Maximum permitted max green times for Snape Road of 60 seconds.
30MPH speed restriction |
Traffic control (two-way signals) |
21 June 2026 |
17 December 2027 |
Suffolk County Council |
|
Annesons Corner |
Sizewell C – SZC0669
(SLR-TM-011)
Annesons Corner/Hawthorn Road - Full Road Closure required for construction of
Sizewell Link Road - stopped up.
24hr closure.
Progressed under Article 19. |
10 August 2026 |
27 April 2027 |
Sizewell C |
|
|
Buckleswood Road |
OVERHEAD WIRE TRANSFER |
6 September 2026 |
7 September 2026 |
BT |
|
|
Buckleswood Road |
SZC0674 TO/15 and traffic signals to manage rail movements over the level
crossing for rail movements associated with the construction of the green rail
route only. 9,10 & 14 July (only) for road testing
patch test /skid resistance testing 1 July (only) |
Traffic control (two-way signals) |
10 July 2026 |
4 September 2026 |
Sizewell C |
|
Thorpe Road |
Installation of 30mph speed restriction for site access / Egress safety. |
25 May 2026 |
1 September 2027 |
Suffolk County Council |
|
|
White House Road |
Sizewell C – SZC
West House Site Operations
- Temporary road obstruction required for the upgrade of West House LX which is in relation to the Sizewell C AD4 Rail Scheme.
- Delivery of the Materials and Equipment
- Movement of service vehicles and effluent collections
TO15 required to complete all the essential activities in a safe manner. All site operations are in relation to the Sizewell C AD4 Rail Scheme.
Access will be maintained for local properties and the emergency services. |
16 April 2026 |
9 October 2026 |
Sizewell C |
|
|
Abbey Road |
Sizewell C - SZC0589
Two-way trafic signlas to allow rail movements over the LX following the track
install.
Signals to be implemented at any time. Expectation is up to 15 crossings between
09:00 to 17:00 and 19:00 to 0700. Signals only implemented for rail crossing. |
Traffic control (two-way signals) |
26 April 2026 |
4 September 2026 |
Sizewell C |
|
The Green |
Sizewell C – SZC0496
Knodishall Compound 05/12/2025 - 05/05/2026
Requirement - TO15 for duration of MWL for delivery of welfare facilities.
Deliveries will be carried out on a 2 weekly basis
TO15 won't be used at the same time of the UKPN closure that's in place
overnight on 15th December.
Traffic Management Plan for movements taking place next week on 24th/25th June (updated to cover welfare & material deliveries) for a one-off delivery for that week. |
15 December 2025 |
31 October 2026 |
Suffolk County Council |
|
|
Westward Ho |
Sizewell C – (SZC0206)
Article 24 Speed Limit Buckleswood Road
Temporary 30mph speed limit Related to LA 928577 |
21 April 2025 |
31 December 2026 |
Suffolk County Council |
|
|
Road From A12 Yoxford To A1094 Aldeburgh |
Sizewell C – SZC0142 Temporary closure of layby west side of B1122 Abbey Road opposite Eastbridge Road junction to facilitate new roundabout construction and access into adjacent field for drainage, ducting & new bridleway construction. Cones & Signing only |
17 March 2025 |
31 December 2026 |
Suffolk County Council |
|
|
Road From A12 Yoxford To A1094 Aldeburgh |
Sizewell C – SZC0139 - Construction of new roundabout on B1122 Abbey Road / Eastbridge Road for primary access to the Main development site. Temporary traffic signals required at various stages throughout the duration of the works which will be manually controlled during peak periods. Works include drainage, ducting, earthworks, kerbing, road construction, street lighting, Pegasus crossing, surfacing, signs & road markings to facilitate new roundabout construction. |
Traffic control (multi-way signals) |
16 June 2025 |
31 December 2026 |
Suffolk County Council |
|
Abbey Road |
Sizewell C – SZC0140 - Carriageway construction & realignment works for SZC main development site roads. Combination of signing only & temporary traffic signals required at various stages throughout the duration of the works. Traffic signals will be manually controlled during peak periods. Works include drainage, ducting, earthworks, kerbing, road construction, street lighting, Pegasus crossing, surfacing, signs & road markings to facilitate road alignment. |
Traffic control (multi-way signals) |
16 June 2025 |
31 December 2026 |
Suffolk County Council |
|
Lovers Lane |
Sizewell C – SZC0141
Carriageway construction & realignment works on Lover’s Lane which includes Combination of signing only & temporary traffic signals required at various stages throughout the duration of the works. Traffic signals will be manually operated during peak periods.Works include drainage, ducting, earthworks, kerbing, road construction, street lighting, Pegasus crossing, surfacing, signs & road markings to road realignment |
Traffic control (multi-way signals) |
16 June 2025 |
31 December 2026 |
Suffolk County Council |
|
King Georges Avenue |
Sizewell C – (SZC0165) Article 24 Speed Limit King George’s Avenue, Leiston |
10 March 2025 |
31 March 2028 |
Suffolk County Council |
|
|
Eastbridge Road |
Sizewell C - SZC0138 - Eastbridge Road Plant Crossing. Construction of plant crossing point across Eastbridge Road from main site compound for Bridleway 19 Section 8 construction access. Manually operated ‘STOP WORKS’ signs to be used to safely control vehicular traffic for short periods (max 2 minutes) to allow construction traffic to cross the carriageway as and when required. |
10 February 2025 |
31 December 2026 |
Suffolk County Council |