The A556 is a key strategic route linking the West Midlands and Cheshire to Greater Manchester and Manchester International Airport. The new link between junction 19 of the M6 and junction 7 of the M56 replaces the most congested link on England’s trunk road network, carrying 52,000 vehicles per day and with a recognised poor accident/incident record. The new £192m dual carriageway creates a safer, more reliable trunk route in rural Cheshire which is bounded by sensitive RAMSAR and SSSI sites.
It is one of the largest infrastructure projects in the North West which makes significant environmental, economic and social improvements in line with the Government’s vision for transport.
Capita provided multi-disciplinary highway engineering and environmental services, including assessment of options to DMRB Stage 2, stakeholder engagement, environmental and geotechnical surveying, air quality, noise and vibration, transport technology, transportation and traffic modelling, project management, cost management, CDM principal designer, risk and value management, design development. Preparation of supporting Target Cost information, extensive support for the Development Consent Order (DCO), construction monitoring, BIM management and level 2 compliant design services.
Key features of the scheme are:
On the project Capita innovatively developed a specific process for hazard tagging in the digital BIM model. This specifically contributed to the development of PAS 1192-6 and the associated HSE publication Improving Health and Safety Outcomes in Construction – Making a Case for Building Information Modelling.
In summary, BIM is used to communicate hazards and safe working practices by illustrating risks and safety procedures visually. ‘Hazard Triangles’ are associated to components in the 3D model. These are linked to the live risk register and colour-coded accordingly (RAG scoring for high / medium / low risks). As risk is closed out or the likelihood / impact mitigated the colour of the risk is downgraded, providing a live illustration of the risk register for simple communication. These triangles are also recreated automatically on associated documentation, including screenshots and 2D drawings, and incorporated into 4D sequences – linking the model to the programme, illustrating risks at particular points in time. These risks are annotated with Risk IDs and Risk Descriptions.
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