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 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