I want to know which is the longest rail track without joints in the world, and in India?

Question

Rail tracks are joined by welding which gives a sound when a train moves over them. But when the tracks are welded together, the sound is absent and the train journey is smooth. Will someone throw light on the question.

Answer 1

I do not know the answer to the question in the title of your question, but here's what I do know:

Train tracks like all other things which are really long have expansion joints in them. These expansion joints allow the track to move length-wise without bending the track out-wards or in-wards which would cause the train to derail. When you see cracks on paved roads this is because of that same expansion which happens as the temperature changes. The expansion joints on a train track are bolted together, not welded, and do not cause noise. If they do cause noise, then the rail is getting ready to break.

The noise you hear is not caused by the joints, but by the plates which lay underneath the track, and the track banging together. This is caused because some of the rail road ties have sunk into the rocks below them causing an uneven surface. If you were to watch as the train went by, and figure out where the noise is coming from, making it stop clanking can be as simple as beating the spikes back into the board, or putting a coin between the rail and the plate it is banging on.

Answer 2

The sound is from the joints in the rail. The same sound happens when a train goes over a frog (a point where the tracks intersect.  Usually on 'high speed' turnouts, they install what is known as a moveable point frog (mpf) pictured here

http://rides.webshots.com/photo/10723261...

I know that the length for ribbon rail (which is what you described, being welded together instead of bolted joints) is usually abour 1/4 mile long while on a "ribbon rail train" seen here http://www.wsorrailroad.com/projects/and...  

After laying the rail the workers will weld it together, and if they need to put in insulated joints (seen here http://www.alpharail.net/corp/signals/pr... ) because of how the signal system works (and sometimes for at grade crossings with vehicle traffic) they will do so.

Expansion joints and insluated joints are usually the only joints in ribbon rail.

I do not know the length of the longest continious piece of rail (not track) so i guess that i cannot answer your question. but this should help you understand that the length would not be very long in railroad length.

Answer 3

not possible to built such tracks......at the most it could be a bit longer than other ones....but definitely of wat you are asking for.........

Answer 4

maybe you mean the hi speed trains of japan?

http://www.railway-technology.com/projec...

Answer 5

i think i read somewhere that nagpur - gondia railway line in maharashtra having all the welded rail tracks... just try to search the google..