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HS2 Tunnel Progress: B4525 Realignment Boosts Local Traffic

12/10/2025

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Summary

Story summary

The realignment of the B4525 road near Greatworth, West Northamptonshire, enables the next excavation phase for a 2.7km tunnel by HS2 Ltd using a cut-and-cover method.
Engineers are installing five to six concrete segments daily after completing the first kilometre of the tunnel.
HS2 Ltd's Project Manager Sam Arrowsmith says the milestone benefits local traffic and is aided by improvements from the nearby Chipping Warden tunnel.

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Story summary

The realignment of the B4525 road near Greatworth, West Northamptonshire, enables the next excavation phase for a 2.7km tunnel by HS2 Ltd using a cut-and-cover method.
Engineers are installing five to six concrete segments daily after completing the first kilometre of the tunnel.
HS2 Ltd's Project Manager Sam Arrowsmith says the milestone benefits local traffic and is aided by improvements from the nearby Chipping Warden tunnel.