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What’s the difference between Vadodara and Baroda? And other stations that have changed names.

19-07-2019

Many towns have changed names over the years. In many cases the change in the spelling of a place stems from a desire for the name to more closely reflect the pronunciation of the name in the local language. Older spellings were generally assigned in the Roman script by the British and in some cases did not correspond closely to the spoken version of the name. The list below gives several instances of changed names. The column on the left is the IR spelling of the name today. In many cases (especially for places in Kerala, the spelling on the right (the non-railway spelling) is actually newer, being used everywhere except in railway contexts). Alleppey -- Alappuzha Balasore --

What are the nets one sees on rockfaces or hillsides abutting railway lines in some areas?

July 19, 2019

In areas where rock falls or landslides are common, IR uses meshes or nets fixed to the rockfaces or the hillsides -- these are 'stitched' to the hillside at frequent intervals. They act to trap and stop, or slow down falling or sliding rocks and boulders so that they either do not fall all the way down, or lose their kinetic energy and fall

What tolerances of gauge does IR permit?

July 19, 2019

Broad Gauge Deviations allowed from nominal gauge: -5mm to +3mm on straights and curves over 350m radius, and up to +10mm on curves sharper than 350m radius. (The older specifications were: On straight sections, a deviation of +/- 6mm; and on curves a deviation of up to +20mm/-6mm.) High-speed sections (130+ km/h) have tighter tolerances of +/-

What are ‘GeoJute’ and ‘GeoGrids’? How does IR prevent soil erosion in the areas where track is laid?

July 19, 2019

Erosion of the soil around a track formation can be quite dangerous as the track may subside or warp and move. In many cases IR simply encourages the local shrubby vegetation to grow in the areas near the track to stem the erosion. Where severe erosion is a problem, 'GeoJute' has been used. This is an ecologically safe material made of jute yarn

What sort of sub-ballast, blanket, and subgrade layers are provided in the track formation?

July 18, 2019

IR generally does not use a separate sub-ballast layer below the ballast layer. A blanket layer of coarse, granular material is usually provided directly below the ballast layer. Blanket layers are not provided for tracks on rocky beds, or on well-graded gravelly or sandy beds. Blankets of at least 45cm thickness are provided for tracks laid on

What kinds of ballast does IR use?

July 18, 2019

For all high-traffic lines, IR uses machine crushed hard stone ballast, usually from locally quarried granite stone, or crushed basalt. In the past, broken brick, slag from metal processing, cinders, and waste construction material were also used. For most sections with wooden sleepers, the ballast is of a 6.5cm nominal size (not more than 5%

What are the typical placement specifications for check rails or guard rails?

July 18, 2019

Wheel flanges on IR are typically about 28mm thick (new). The distance between the inner faces of wheels is typically 1600mm (BG). Check rails used to prevent wheels from climbing the rails at sharp curves are kept at a distance of about 44mm-48mm from the outer rail, allowing about 4mm tolerance for wear on the check rails. Check rails at level

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What’s the difference between Vadodara and Baroda? And other stations that have changed names.

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