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The stone in old railways track arebasically "track ballast".itis packed between, below, and around the ties.
It is used to facilitate
drainageof water, to bear the load from the railroad ties, and also to keep down
vegetationthat might interfere with the track structure.
This also serves to hold the track in place as the trains roll by. It is typically made of
crushed stone, although ballast has sometimes consisted of other, less suitable materials. The term "
ballast" comes from a nautical term for the stones used to stabilize a ship
A good ballast should be strong, hard-wearing, stable,
drain-able
easy to clean, workable, resistant to deformation, easily available, and reasonably cheap to purchase.
Early railway engineers did not understand the importance of quality track ballast
they would use cheap and easily-available materials such as ashes, chalk, clay,
earth, and even
cindersfrom locomotive fireboxes.
It was soon clear that good-quality ballast made of
rockwas necessary if there were to be a good foundation.
The metro railways use the most modern technology which involvesballast-less track system therefore there are no stones to be seen in the tracks.
RHEDA 2000 is a latest ballast-less track system.
Please reffer the links below for more information
http://www.railone.in/fileadmin/dateien/03 Broschueren/EN/Rheda2000 EN 2011 ebook.pdf
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Guangzhou East Railway Station - metro - was created in 1999.
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when was metro railway of kolkata became a zone
Where metro Railway headquarter?
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The Luhya translation of the English words 'railway track' is "Irelwee".
What doea metro mean?
A metro refers to an electric railway that operates underground in a given city.
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Its not necessarily heavier (thicker is the wrong term), but it is more carefully aligned - and the curves are gentler.
Is metro a type of railway system in a city?
yes
Which of these refers to a type of railway system in a city?
Metro
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yes there is
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railway minister
Is metro refers to a type of railway system in a city?
In Washington DC the Metro is a light rail system.
