Causeway one.network

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