Published date: 26 June 2025

Awarded contract - This means that the contract has been awarded to a supplier.


Closing: 18 June 2025, 7pm

Contract summary

Industry

  • Surface water pollution rehabilitation services - 90733200

Location of contract

Any region

Value of contract

£94,496.76

Procurement reference

tender_495097/1494883

Published date

26 June 2025

Closing date

18 June 2025

Closing time

7pm

Contract start date

25 June 2025

Contract end date

31 March 2026

Contract type

Service contract

Procedure type

Call-off from a framework agreement

A mini-competition or direct purchase from a pre-established framework agreement.

Contract is suitable for SMEs?

Yes

Contract is suitable for VCSEs?

No

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.

More information

Attachments

Award information

Awarded date

25 June 2025

Contract start date

25 June 2025

Contract end date

31 March 2026

Total value of contract

£94,496.76

This contract was awarded to 1 supplier.

WSP UK Limited

Address

WSP UK Ltd

Reference

No reference - other

Supplier is SME?

No

Supplier is VCSE?

No

About the buyer

Address

The Cube, 199 Wharfside Street
Birmingham
B1 1RN
England

Email

spats2@nationalhighways.co.uk