North Downs Tunnel
The North Downs Tunnel, also known as the Blue Bell Hill Tunnel, is a railway tunnel that carries High Speed 1 through the North Downs, at Blue Bell Hill near Maidstone in Kent, south-east England. The tunnel is 3.2 kilometres (2 mi) long, with an internal diameter of 12 metres (40 ft) and a cross-sectional area (CSA) of 150 square metres, and descends to a depth of 100 m (325 ft) below the chalk hills. Thus, at the time of its completion, the North Downs Tunnel was both the largest (in terms of CSA) and deepest twin-track railway tunnels to have ever been constructed in the UK. Trains using High Speed 1 can reach 300 kilometres per hour (186 mph) whilst in the tunnel.
Excerpt from the Wikipedia article North Downs Tunnel (License: CC BY-SA 3.0, Authors, Images).North Downs Tunnel
A229, Tonbridge and Malling Aylesford
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Geographical coordinates (GPS)
Latitude | Longitude |
---|---|
N 51.3289 ° | E 0.50589 ° |
Address
A229
ME5 9RA Tonbridge and Malling, Aylesford
England, United Kingdom
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