T0695 Diverging Diamond Interchanges - update to DMRB standard CD 122
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key details
| Value | £94,497 |
|---|---|
| Status | complete |
| Category (CPV) | 90733200 |
| Deadline | 18 Jun 2025 |
| Contract start | 25 Jun 2025 |
| Contract end | 31 Mar 2026 |
| Procedure | selective |
| SME suitable | Yes |
| OCID | ocds-b5fd17-b4c136e0-b340-4d19-a00b-ee1b2e94737e |
Award
| Supplier | Value | Date | Status |
|---|---|---|---|
| WSP UK Limited | £94,497 | 24 Jun 2025 | active |
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. |
notice history
1 notice published against this procurement.
| Published | Type | Regime | Notice |
|---|---|---|---|
| 26 Jun 2025 | Award (award) | · | c72b3a73-f799-4e4e-a9be-322bee88c1ac-851538 |
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source
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