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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 21st July 2026 03:42:49 AM
Location | Description | Traffic Management | Start Date | End Date | Responsibility |
|
Town Steps |
Renew inoperable stoptap and reinstate |
27 July 2026 |
30 July 2026 |
Essex And Suffolk Water |
|
|
Yoxford Road |
vegetation cut back |
21 July 2026 |
21 July 2026 |
Suffolk County Council |
|
|
Yoxford Road |
vegetation cut back |
Traffic control (two-way signals) |
21 July 2026 |
21 July 2026 |
Suffolk County Council |
|
Eastward Ho |
Trace, then excavate to repair gas escape and reinstate where possible |
20 July 2026 |
28 July 2026 |
Cadent |
|
|
Back Road |
RECOVER 1X OUT OF USE POLE |
22 July 2026 |
24 July 2026 |
BT |
|
|
Back Road |
Recover out of use pole |
22 July 2026 |
24 July 2026 |
BT |
|
|
Seaward Avenue |
Sizewell C – SZC0716
Conducting Utility trial holes to confirm locations and depths for the design of the local road upgrade scheme.
Working priority signage and segregating the works from the Live traffic.
Work between 9am and 3pm |
19 July 2026 |
21 July 2026 |
Sizewell C |
|
|
Town Steps |
Renew inoperable stoptap and reinstate |
19 July 2026 |
22 July 2026 |
Essex And Suffolk Water |
|
|
Back Road |
RECOVER 1X OOU POLE |
22 July 2026 |
24 July 2026 |
BT |
|
|
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) |
12 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) |
12 July 2026 |
17 December 2027 |
Suffolk County Council |
|
B1125 |
Ducting and chamber works in carriageway |
27 July 2026 |
30 July 2026 |
Virgin Media |
|
|
High Street |
ALDEBURGH 1339831 - INTERIM TO PERMANENT - in verge / footway |
13 July 2026 |
24 July 2026 |
BT |
|
|
High Street |
Excavation required to provide telecoms/fibre services for customer. All work in footway. Clearing blocked duct. 1 meters of duct to be installed in footway to boundary of property. |
19 July 2026 |
22 July 2026 |
BT |
|
|
Abbey Road |
Chamber and ducting work in Carriageway |
Traffic control (two-way signals) |
17 July 2026 |
24 July 2026 |
Virgin Media |
|
Abbey Road |
Clear carriageway blockage |
Traffic control (two-way signals) |
27 July 2026 |
30 July 2026 |
Virgin Media |
|
Leiston Road |
Build 2 x chamber in carriageway, clear blockages in carriageway and desilt carriageway chamber |
Traffic control (multi-way signals) |
27 July 2026 |
30 July 2026 |
Virgin Media |
|
Park Hill |
Streetlighting Unit Replacement |
Traffic control (multi-way signals) |
27 July 2026 |
27 July 2026 |
Suffolk County Council |
|
Waterloo Avenue |
Streetlighting Unit Replacements |
Traffic control (multi-way signals) |
20 July 2026 |
24 July 2026 |
Suffolk County Council |
|
B1125 |
Ducting and chamber works in carriageway |
27 July 2026 |
30 July 2026 |
Virgin Media |
|
|
King Georges Avenue |
100 DI service disconnection from the main located in the far side carriageway |
20 July 2026 |
24 July 2026 |
Cadent |
|
|
Westward Ho |
Sizewell C – SZC0624 (Article 19)
Leiston LX Full Closure
Sleeving installation & Trial Holes (Excavation depth 2metres), In advance of
Cadent closure with handover coordinated with Cadent. Closure in place 24/7 due
to excavation requirements. Western footway to remain open during closure.
20/07/2026 06:00hrs - 09/08/2026 00:00hrs |
26 July 2026 |
30 August 2026 |
Sizewell C |
|
|
Station Road |
Sizewell C – SZC0624 (Article 19)
Leiston LX Full Closure
Sleeving installation & Trial Holes (Excavation depth 2metres), In advance of
Cadent closure with handover coordinated with Cadent. Closure in place 24/7 due
to excavation requirements. Western footway to remain open during closure.
20/07/2026 06:00hrs - 09/08/2026 00:00hrs |
26 July 2026 |
30 August 2026 |
Sizewell C |
|
|
Haven Road |
ABANDON 4" SI & REPLACE 75MM PE. APPROX 10 SERVICES. |
26 July 2026 |
10 August 2026 |
Cadent |
|
|
Seaward Avenue |
ABANDON 4" SI & REPLACE 90MM PE. APPROX 100 SERVICES. |
26 July 2026 |
2 September 2026 |
Cadent |
|
|
South Close |
ABANDON 6" SI & REPLACE 75MM PE. APPROX 15 SERVICES. |
13 July 2026 |
17 August 2026 |
Cadent |
|
|
Andrew Close |
ABANDON 4" SI & REPLACE 75MM PE. APPROX 30 SERVICES. |
20 July 2026 |
5 August 2026 |
Cadent |
|
|
Red House Lane |
CONNECTION PERMIT |
Traffic control (multi-way signals) |
20 July 2026 |
5 August 2026 |
Cadent |
|
Garrett Crescent |
ABANDON 4" SI & REPLACE 90MM PE. APPROX 100 SERVICES. |
Traffic control (multi-way signals) |
13 July 2026 |
5 August 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 |
|
Yoxford Road |
SZC - 0654 - YOXFORD 1391043 - To Demolish a FW / CW / Verge joint box, Rebuild a FW / CW / Verge joint box and lay approx 320m Duct 56/54 in FW / CW / Verge |
Traffic control (two-way signals) |
19 July 2026 |
31 July 2026 |
BT |
|
Sylvester Road |
Connections Small Works: Install / Replace / Remove / Disconnect underground service cables: DIGGING IN THE FOOTWAY OUTSIDE OF 18 SYLVESTER ROAD FOR ELECTRICAL WORKS, DIVERT PEDESTRIANS TO FOOTWAY OPPOSITE. |
22 July 2026 |
28 July 2026 |
UK Power Networks |
|
|
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 |
|
Aldeburgh Road |
CONNECTION |
Traffic control (multi-way signals) |
26 July 2026 |
6 August 2026 |
Cadent |
|
Haylings Road |
ABANDON 100M DI & REPLACE 90MM PE. APPROX 6 SERVICES. |
Traffic control (multi-way signals) |
19 July 2026 |
2 August 2026 |
Cadent |
|
Haylings Grove |
ABANDON 4" SI & REPLACE 165MM PE. APPROX 18 SERVICES. |
6 July 2026 |
2 August 2026 |
Cadent |
|
|
Lime Tree Avenue |
ABANDON 200MM DI & REPLACE 150MM PE. APPROX 38 SERVICES. |
8 June 2026 |
26 August 2026 |
Cadent |
|
|
Ashfield Drive |
ABANDON 100M DI & REPLACE 90MM PE. APPROX 25 SERVICES. |
Traffic control (multi-way signals) |
8 June 2026 |
26 August 2026 |
Cadent |
|
Sloe Lane |
Installation of 30mph speed restriction for site access / Egress safety. |
25 May 2026 |
1 September 2026 |
Suffolk County Council |
|
|
Thorpe Road |
Installation of 30mph speed restriction for site access / Egress safety. |
25 May 2026 |
1 September 2027 |
Suffolk County Council |
|
|
George Road |
Sizewell C – SZC0593
Moat Road and George Road full road closure for construction of Sizewell Link
Road - stopped up
24 hour closure
Progressed under Article 19 |
26 May 2026 |
4 September 2028 |
Sizewell C |
|
|
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 |
|
Pretty Road |
Sizewell C – SZC0402 (SLR-TM-006)
Construction of Sizewell Link Road Northbound Diversion Signage "Hollow Square" Southbound Diversion Signage "Hollow Circle" |
19 April 2026 |
13 August 2026 |
Sizewell C |
|
|
Pretty Road |
Sizewell C – SZC0402 (SLR-TM-006)
Construction of Sizewell Link Road Northbound Diversion Signage "Hollow Square" Southbound Diversion Signage "Hollow Circle" |
19 April 2026 |
13 August 2026 |
Sizewell C |
|
|
Grove Road |
4-way traffic lights installed as a substitute for the permanent traffic signals on the S278 design while the permanent signal supply is being organised. Lights will give priority to 2-way traffic on Grove Road, and will be manually operated to switch to a plant crossing for the haul road when required. No works are being undertaken in highway, only TM to be installed. |
Traffic control (multi-way signals) |
19 January 2025 |
26 August 2026 |
East Anglia Two |
|
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 |
|
|
Aldeburgh Road |
4-way traffic signals to allow Low loader to reverse up to the junction of B1122 / B1353 and turn around to travel north after loading / unloading plant at access point 8b. |
Traffic control (multi-way signals) |
19 October 2025 |
26 August 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 |
26 August 2026 |
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 |
|
|
Grove Road |
Installation of construction access signing (grid ref for site access points � 641661,261797 / 624093, 262633 & 641504, 260819) TO15 / stop/go for plant deliveries / collections as / when needed. |
28 October 2024 |
26 August 2026 |
Suffolk County Council |
|
|
Thorpe Road |
Installation of 30mph speed restriction for site access / Egress safety. Installation of construction access signing (grid ref for site access points � 645064,260821 / 645286, 260753) 2 way traffic signals for plant deliveries / collections as / when needed.
(access points 9 & 10) |
Traffic control (two-way signals) |
28 October 2024 |
28 August 2026 |
Suffolk County Council |
|
Aldeburgh Road |
Installation of 30mph speed restriction for site access / Egress safety. Installation of construction access signing (grid ref for site access points � 644631,260451 / 644634, 260827) 2 way traffic lights for plant deliveries / collections as / when needed. |
Traffic control (two-way signals) |
28 October 2024 |
26 August 2026 |
Suffolk County Council |
|
Snape Road |
Installation of 30mph speed restriction for site access / Egress safety. Installation of construction access signing (grid ref for site access point � 640138,261153) 2 way traffic lights for plant deliveries / collections as / when needed. |
Traffic control (two-way signals) |
28 October 2024 |
26 August 2026 |
Suffolk County Council |
|
Sloe Lane |
Installation of 30mph speed restriction for site access / Egress safety. Installation of construction access signing (grid ref for site access point � 640138,261153) 2 way traffic lights for plant deliveries / collections as / when needed. |
Traffic control (two-way signals) |
28 October 2024 |
26 August 2026 |
Suffolk County Council |
|
Road From A12 To A1094 |
Installation of 30mph speed restriction for site access / Egress safety. Installation of construction access signing (grid ref for site access point � 640138,261153) 2 way traffic lights for plant deliveries / collections as / when needed.
B1121, Friston (access point 1)
B1121, Friston (access point 1) |
Traffic control (two-way signals) |
28 October 2024 |
26 August 2026 |
Suffolk County Council |
|
Saxmundham Road |
Installation of 30mph speed restriction for site access / Egress safety. Installation of construction access signing (grid ref for site access point � 640138,261153) 2 way traffic lights for plant deliveries / collections as / when needed.
B1121, Friston (access point 1)
B1121, Friston (access point 1)
B1121, Friston (access point 1) |
Traffic control (two-way signals) |
28 October 2024 |
28 August 2026 |
Suffolk County Council |
|
Lovers Lane |
Installation of 30mph speed restriction for site access / Egress safety. Installation of construction access signing (grid ref for site access points � 645064,260821 / 645286, 260753) 2 way / 3 waytraffic signals for plant deliveries / collections as / when needed. |
Traffic control (two-way signals) |
28 October 2024 |
26 August 2026 |
Suffolk County Council |