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Introduction
Market Sectors
Services - Buildings
Services - Environment
Services - Transportation
■	Aviation
■	Bridges
■	Development
■	Event Management
■	Freight Management
■	Highways
	■	A1 Dishforth to Barton ECI
	■	A11 Attleborough Bypass Improvement Scheme
	■	A2/M2 Widening
	■	HA Spatial Planning Consultancy
	■	N7 Naas Road Improvement
■	Infrastructure Maintenance
■	Intelligent Transport Services
■	Investment Appraisal
■	Light Rapid Transport
■	Local Roads
■	Market Research
■	Performance Management
■	Quality Bus Systems
■	Rail Planning and Engineering
■	Road User Charging
■	Strategy and Plan Development
■	Structures
■	Traffic Planning
■	Transport Project Management
■	Transportation Planning
■	Tunnelling
■	VISSIM Micro-Simulation Software
Capabilities A - Z

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A11 Attleborough Bypass Improvement Scheme

Norfolk, UK

Project outline

Faber Maunsell was designers for this first Early Contractor Involvement highway scheme to be awarded in the East of England. The 5.5km Attleborough Bypass was widened from a single carriageway to an all purpose dual carriageway with three new junctions and five major structures including the iconic steel tied-arch West Carr Community Link bridge.

Over the course of just four years the design team played a significant part in taking the scheme from route announcement to road opening. During this period FM overcame early set-backs and delays to Publish Orders and a full Environmental Statement in time for the Public Inquiry to be held on schedule. FM went on to deliver the detailed design and provide site supervision.

Contract value

£22M (capital works)

Key features

ECI form of Contract
Partnering approach
Statutory Procedures including Public Inquiry
On-line widening next to urban area
Five reinforced concrete Structures
Tubular Steel tied-arch Bridge design
Innovative drainage solutions
Significant Ecological Constraints – Stream Diversion
HA National awards for safety and delivery to time.
ICE regional award for technical excellence

Skills utilised

Management
Communication
Multidisciplinary project coordination (Integrated design management)
Client relationship management and partnering.
Engineering design (highways, drainage, pavement, structures etc.)
Landscape and Environmental coordination and management
Statutory process completion (Publication of Orders etc.)
Expert Witness at Public Inquiry
Public Liaison

Project detail

Faber Maunsell was engaged by May Gurney as their designer for the A11Attleborough Bypass Improvement Scheme. The commission was for an Early Contractor Involvement (ECI) Scheme and as such involved the design, development, promotion and completion of statutory processes on the proposals to widen the existing single carriageway two-lane Attleborough Bypass to two lane dual carriageway.

The A11 connects Norwich to London via the M11 and the trunk road network via the A14. The Attleborough Bypass was one of only two remaining sections of the A11 to be dualled, before this strategic trunk road link could be completed.

The work was divided into three phases. In Phase 1A, FM were key contributors to the reappraisal of the scheme to ensure the design solution offered the Highways Agency a scheme that represented value for money. Following this there was a very short timescale during which a preliminary design was developed; and draft Orders and a full Environmental Statement published in June 2004.

This work was achieved in the time by an integrated design team approach involving the HA team, the contractor and the full environmental team including landscape, ecology, flood plain analysis and archaeologists. We also adopted a proactive approach with the public and with third party consultees helping to shorten approval times on the approach to Publication. Three public Exhibitions were held during the development of the scheme to help keep people informed and canvass opinion.

During the next Phase (1B) we achieved an unprecedented decision to go ahead with a completely unaltered Published Scheme following a Public Inquiry held in November 2004, just 5 months after Publication.

Phase 2 involved the completion of the detailed design and work on site began in August 2005 with advance site clearance and ecological mitigation preparation works. Construction work was completed to programme with the road opened to traffic on 08 February 2007.

The detailed design included the use of innovative ‘Green Channel’ drainage; design of a tubular steel tied-arch ‘Gateway’ footbridge; a versatile design method performance related pavement design; compensatory measures for construction in a flood plain; stream diversionary works; water vole relocation and creation of a full grade-separated signal control junction which together with the bridge, reduces the severance between town and country created by the original bypass.