Variable speed limits to cut bridge closures

01/04/2021 | CHRIS AMES

Highways England has completed upgrades to the Orwell Bridge at Ipswich, which it said will help keep it open more often during high winds.

The structure carries up to 60,000 vehicles over the River Orwell every day and is an essential route for many drivers heading to the International Port of Felixstowe.

Like other high bridges, the Orwell Bridge can be affected by high winds, which can force its closure, but Highways England has installed new electronic signs on the bridge that will display changeable speed limits so traffic will continue to safely use the bridge at lower speeds safely when it is windy.

The 60mph speed limit will remain in place on the bridge during low wind but when wind speeds of 45mph to 60mph are predicted a new 40mph speed limit will be imposed. If wind speeds of 60mph or more are predicted, the bridge will be closed.

Average speed cameras will be in place on either side of the bridge, and drivers breaking the speed limit will be referred to Suffolk Police for prosecution.

The existing speed limit is already enforced using a SPECS solution, but supplier Jenoptik enhanced the existing installation to allow different speed limits to be enforced.

Jenoptik director Geoff Collins said: ‘The Orwell Bridge SPECS installation was proving successful in managing speeds and flows over the structure, but this unique new configuration permits the crossing to still be used safely with higher wind speeds.’

The £1.7m project was backed by the findings of a year-long aerodynamic study by City University of London, which concluded that the current wind limit of 60mph for closing the structure is correct for safety.

However, modelling showed that reducing the traffic speed limit to 40mph during wind speeds of 45 to 60mph meant the bridge could safely remain open to traffic.

Highways England said that with the bridge standing 43 metres above the river and 1000m in length, it provided a difficult environment for the construction work to take place.

Its crews faced the added complexity of working at night in sub-zero temperatures throughout January, February and March to deliver the enhancements on time.

Highways InProfile

latest magazine issue
Highways jobs

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

Head of Highways Operations

Salary
Somerset Council
Recruiter: Somerset Council

Works Technician

£37,399 (plus unsocial hours allowance)
The Works Technician is responsible for ensuring that the London Trams civils and off-track infrastructure Croydon (City/Town), London (Greater)
Recruiter: Transport for London
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