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Ampthill Tunnel
Railway tunnel in Bedfordshire, England / From Wikipedia, the free encyclopedia
Ampthill tunnel is a railway tunnel at Ampthill on the Midland Main Line, being positioned between Bedford and Flitwick. It consists of two separate bores, each one accommodating double-track throughout.
![]() Ampthill Tunnel | |
Overview | |
---|---|
Line | Midland Main Line |
Location | Ampthill, Bedfordshire |
Coordinates | 52°02′01″N 0°30′48″W |
Operation | |
Work begun | 1865 |
Opened | 1868 |
Owner | Network Rail |
Technical | |
Length | 759 yards (694 m) |
The first Ampthill Tunnel was built during the 1860s; growing demand on the line led to the original double-track configuration being inadequate for further growth. Thus, during the 1890s, a second Ampthill Tunnel was constructed directly alongside, facilitating the Midland Railway's expansion plans of running a quadruple-track arrangement between Kettering and London wherever practical to do so. Both bores have remained active through to the present day. During mid 2012, Ampthill Tunnel was subject to a series of high speed evaluation runs, including a record maximum speed for the route of 125 miles per hour (201 km/h); in the following year, the line speeds were increased to 125 mph along much of the Midland Main Line.