Black Cat scheme embarks on engineering feat the 'size of a whale'

24/10/2024 | CHRIS AMES

Black Cat scheme embarks on engineering feat the 'size of a whale'

National Highways will close the A421 in Bedfordshire for two weekends next month to install six massive steel beams for a new bridge as part of its £1bn A428 Black Cat to Caxton Gibbet scheme.

The government-owned company said a new Roxton Road bridge is essential to accommodate the new westbound slip road and eastbound free-flow link from the A421 onto the A1 as the current bridge cannot support these upgrades.

The A421 will be closed in both directions between Renhold and Black Cat roundabout, as well as the existing Roxton Road bridge, from 9pm Friday 1 November to 5am Monday 4 November 2024 and from 9pm Friday 8 November to 5am Monday 11 November 2024.

During the closures, specialist crews will use a 750-tonne crane to manoeuvre six massive steel beams that will form the backbone of the new bridge into place over the A421.

Each beam weighs 130 tonnes and is 37 metres long – ‘approximately the same weight as a fully grown blue whale and length of a Boeing 737 aircraft’.

Once the beams are secured, work will begin on the structure – known as formwork – that will support the surface of the new bridge.

Programme manager Gareth Moores said: ‘The scale and complexity of this engineering feat cannot be overstated and marks a significant moment for our scheme.

‘We understand road closures can be inconvenient, but it’s important to remember that the majority of work so far has been completed while keeping the A421 open to traffic.’

The new Roxton Road bridge with the upgraded Black Cat roundabout in the background

The Black Cat scheme, which is National Highways largest infrastructure scheme currently under construction, will deliver a new 10-mile dual carriageway linking the A1 and A421 Black Cat roundabout in Bedfordshire with the A428 Caxton Gibbet roundabout in Cambridgeshire.

Both roundabouts will be upgraded to free-flowing junctions.

The scheme is due to open to traffic in 2027.

Highways InProfile

latest magazine issue
Highways jobs

Project Lead - Bridges and Structures WMF3037e

£45,718 to £46,731
We are currently seeking to recruit a Project Lead to join our Bridges and Structures team Kendal, Cumbria
Recruiter: Westmorland and Furness Council

Traffic Management Technician - WMF3040e

£27,711 - £28,624
Are you an organised and motivated individual who wants to make a difference to how our roads are managed? Cumbria / Various
Recruiter: Westmorland and Furness Council

Traffic Management Officer - WMF2114e

£37,035 - £37,938
Are you an experienced and motivated professional looking to take the next step in your traffic management career? Cumbria / Various
Recruiter: Westmorland and Furness Council

Senior Transport Planner

£47,532 - £50,574
Royal Greenwich is a borough synonymous with first class modern services Greenwich, London (Greater)
Recruiter: Royal Borough of Greenwich

Technician - Highway Inspector

Grade 8 £28,797 - £30,708 per annum (Pay Award Pending)
Within the Highways Maintenance Team we are looking for an enthusiastic, customer focused and experienced person to join the Service Derbyshire
Recruiter: Derbyshire County Council

Project Delivery Senior Team Leader

£74,480 - £85,964
Are you an experienced Chartered Civil Engineer (or equivalent professional qualification) Glasgow City
Recruiter: Transport Scotland

Assistant Traffic Management Technician - WMF2104e

£25,584 - £25,992
Westmorland and Furness Council is seeking an organised and enthusiastic individual to join our South Lakeland team Kendal, Cumbria
Recruiter: Westmorland and Furness Council

Bulky Operative

£25,584.00 - £27,269.00, Grade 5, 37 hours, Permanent.
An opportunity exists in the Council’s Street Scene Services for a Bulky Operative Wakefield, West Yorkshire
Recruiter: Wakefield Council

Project Delivery Team Leader

£57,710 - £71,842
Are you an experienced Chartered Civil Engineer (or equivalent professional qualification). Glasgow City
Recruiter: Transport Scotland

Traffic Management Officer - WMF2102e

£37,035 - £37,938
This is a key role supporting the delivery a wide range of traffic and road safety schemes. Kendal, Cumbria
Recruiter: Westmorland and Furness Council

Shared Service Manager (Waste) North Herts Council

£52000 - £61000 per annum
Shared Service Manager (Waste) North Herts CouncilNorth Herts CouncilPermanent, Full Time£52,866 - £61,866 per annum, plus car allowance (pay award pe England, Hertfordshire, Letchworth Garden City
Recruiter: Essex County Council

Street Scene Protection Officer - Braintree District Council

£30000 - £34000 per annum
Street Scene Protection Officer - Braintree District CouncilBraintree District CouncilPermanent, Full Time£30,313 to £34,612 per annumLocation
Recruiter: Essex County Council

Traffic Management Officer - WMF2102e

£37,035 - £37,938
This is a key role supporting the delivery a wide range of traffic and road safety schemes. Kendal, Cumbria
Recruiter: Westmorland and Furness Council

Assistant Traffic Management Technician - WMF2104e

£25,584 - £25,992
This is a key support role, helping to deliver a wide range of traffic and road safety schemes across South Lakeland. Kendal, Cumbria
Recruiter: Westmorland and Furness Council

Flood Risk Engineering and Strategy Officer

£49,764 - £55,623
In line with our One Coventry Values, we want to ensure that our communities are represented across our workforce Coventry, West Midlands
Recruiter: Coventry City Council

Senior Integrated Transport Officer

£34,324 - £37,529
Are you an experienced transport planning professional ready to influence strategic policy and drive real change Matlock, Derbyshire
Recruiter: Derbyshire County Council

Roadworker Trainee LGV Driver (3 Posts)

Grade 6 £25,183 - £25,638 per annum (Pay award pending)
We’re looking for Roadworker/trainee LGV drivers to be part of our team undertaking major highway, bridge and related construction and reconstruction Derbyshire
Recruiter: Derbyshire County Council

Engineer

£44,430 - £51,663
This post is within the Highways Design and Delivery Team. London (Greater)
Recruiter: Tower Hamlets London Borough Council

Civil Enforcement Officer - WMF3013e

£27,711 -£28,624
Are you seeking an active and challenging role, part of a friendly and welcoming team? Cumbria / Various
Recruiter: Westmorland and Furness Council

UGO Bus Driver

Up to £25081.00 per annum
UGO Bus DriverPermanent, Part TimeUp to £25,081 per annum (full time equivalent)Location
Recruiter: Essex County Council
SUBSCRIBE NOW

Latest Video

Subscribe to Highways today to ensure you keep your finger on the pulse of everything happening in the UK road network throughout the year.

SUBSCRIBE NOW