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Notice of traffic management, A4421 and A421

Work item: HS2-EKFB-25-1038

Work Item Summary

Project Phase
Phase 1
Region
Buckinghamshire
Location
A421, A4421
Contractor
EKFB JV
Type of works
Road closure, Traffic management
Estimated Start Date
28/04/2025
Estimated End Date
31/12/2025

What we are doing

We have recently been working alongside the carriageways on the A4421 and the A421. Here we will shortly be constructing highway tie ins which will connect to new sections of road and the newly built bridges. We previously altered the road layouts in the area by reducing sections of the roads to a single lane with temporary traffic lights. This was implemented to enable safe working areas for our staff. After monitoring the current traffic management in the area, we will be undertaking some changes to help improve the traffic flows.

The lights on the east of the A4421 will be temporarily removed which will allow us to prioritise the works on the west of the road.

A4421 Closure
• 28 April 8:30pm to 29 April 2025 5:30am

Temporary Traffic lights
• A4421 – April to December 2025
• A421 – April to September 2025

Download information relating to these works

Find out more about

If you have a question about HS2 or our works, please contact our HS2 Helpdesk team on 08081 434 434 or email [email protected]