Chilterns Tunnel
From Underfoot
Q60791323
The Chiltern Tunnel is a high-speed railway tunnel in Buckinghamshire and Hertfordshire, England, which will carry the High Speed 2 (HS2) railway line under the Chiltern Hills. The twin-bore tunnels, which are 16.04 km long, are the longest on the HS2 line. Each tunnel also has additional 220 m (720 ft) entry and 135 m (443 ft) exit perforated concrete portals to reduce sudden changes in air pressure and subsequent noise.
| Type | Subtype | Date | Description | Notes | Source |
|---|---|---|---|---|---|