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The Hoosac Tunnel (also called Hoosic or Hoosick Tunnel) is a 4.75-mile (7.64 km) active railroad tunnel in western Massachusetts that passes through the Hoosac Range, an extension of Vermont's Green Mountains.
Bridges and tunnels must have a clearance of at least 4,900 mm (16 ft 15 ⁄ 16 in) wide and 6,400 mm (20 ft 11 + 15 ⁄ 16 in) high. The structure gauge S p for passenger platforms allows 4,900 mm (16 ft 15 ⁄ 16 in) only above 1,100 mm (3 ft 7 + 5 ⁄ 16 in) (the common platform height) requiring a width of 3,840 mm (12 ft 7 + 3 ⁄ 16 in ...
Increasing the structure gauge for a larger loading gauge can involve substantial work. The UK's Midland Main Line being upgraded in 2014. In narrow curves, long cars like this 26.4 m (86 ft 7 in) long express train car protrude further into the gauge than on a straight track.
The Housatonic Railroad (/ ˌ h uː s ə ˈ t ɒ n ɪ k / HOOS-ə-TON-ik; reporting mark HRRC) is a Class III railroad operating in southwestern New England and eastern New York.It was chartered in 1983 to operate a short section of ex-New York, New Haven and Hartford Railroad in northwestern Connecticut, and has since expanded north and south, as well as west into New York State.
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However, it took the title from the Hoosac Tunnel (1875) 7.64 km (4.75 mi) as the longest railway tunnel in North America [63] until displaced by the Moffat Tunnel (1928) 10.0 km (6.2 mi) in 1928. Officially opened in July 1916 by the Prince Arthur, Duke of Connaught , the governor general, the Selkirk Tunnel [ 64 ] was renamed the Connaught ...
West portal of B&P Tunnel in 1977. The Baltimore and Potomac Tunnel (or B&P Tunnel) is a double-tracked, masonry arch railroad tunnel on the Northeast Corridor in Baltimore, Maryland, just west of Pennsylvania Station. Opened in 1873, the tunnel is used by about 140 Amtrak and MARC passenger trains and two freight trains every day, as of 2008. [1]
It is 961 feet (293 m) long. The average bridge clearance of 20 feet (6.1 m) (depending on the tide) requires it to swing open to allow maritime traffic to pass underneath it. By the 2000s, the Portal Bridge train speeds were limited to 60 miles per hour (97 km/h). Replacement of the bridge is the first phase of the Gateway Project. [4]