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T0695 Diverging Diamond Interchanges - update to DMRB standard CD 122

National Highways

Buyer Contact Info

Buyer Name: National Highways

Buyer Address: The Cube, 199 Wharfside Street, Birmingham, B1 1RN, England

Contact Email: spats2@nationalhighways.co.uk

Status
complete
Procedure
selective
Value
94496.76 GBP
Published
26 Jun 2025, 10:51
Deadline
18 Jun 2025, 18:00
Contract Start
24 Jun 2025, 23:00
Contract End
31 Mar 2026, 22:59
Category
services
CPV
90733200 - Surface water pollution rehabilitation services
Region
n/a
Awarded To
WSP UK Limited
Official Source
Open Contracts Finder

Description

National Highways (the Client) is seeking the provision of services to undertake research into Diverging Diamond Interchanges (DDI). STAGE 1 SCOPE: Overall, the aims of this task are to: 1. Measure the safety performance of DDIs to clearly understand how or if they are safer than existing junction types; 2. Examine potential risks and hazards such as Wrong Way Driving; 3. Review international standards and determine relevance to UK; and 4. Review the DMRB to understand how requirements and advice would need to change to encompass Diverging Diamond Interchanges. The award of this work package is initially for Stage 1 only (see background). Subject to further funding, a STAGE 2 FEASIBILITY task would be undertaken in the next financial year: - Identify a location where the layout can be retrofitted and modelled to existing infrastructure such as at an existing dumbbell roundabout at a grade separated junction and then examine scalability across the network; - Investigate how any new risks such as Wrong Way Driving or failure of traffic signals can be reduced or removed; - Measure the environmental and economic benefits such as land take reduction and carbon saving; and - Provide recommendations for requirements, advice and drawings to update the DMRB and update the standards CD 122 and CD 123. This is anticipated to be a report and not an update to the standards in case the findings do not support changing the DMRB.

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Opportunity Context

Raw Notice JSON

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