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Blog Entry# 1858126
Posted: May 21 2016 (21:21)

12 Responses
Last Response: May 22 2016 (23:37)
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General Travel
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May 21 2016 (21:21)  
 
Kartheeswaran
Kartheeswaran   480 blog posts
Entry# 1858126              
//Do you Know why IRCTC does not allow you to choose seats? Would you believe that the technical reason behind this is PHYSICS.
Booking a seat in a train is far more different than booking a seat in a theatre.
Theatre is a hall, whereas train is a moving object. So safety concern is very high in trains.
Indian railways ticket booking
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software is designed in such a way that it will book tickets in a manner that will distribute the load evenly in a train.
Let me take an example to make things more clear : Imagine there are sleeper class coaches in a train numbered S1, S2 S3... S10, and in every coach there are 72 seats.
So when some one first books a ticket, software will assign a seat in the middle coach like S5, middle seat numbered between 30-40, and preferably lower berths (Railways first fills the lower berths than upper one so as to achieve low centre of gravity.)
And the software books seats in such a way that all coaches have uniform passenger distribution and seats are filled starting from the middle seats (36) to seats near the gates i.e 1-2 or 71-72 in order from lower berth to upper.
Railways just want to ensure a proper balance that each coach should have for equal load distribution.
That is why when you book a ticket at the last, you are always allotted an upper berth and a seat numbered around 2-3 or 70, except when you are not taking a seat of someone who has cancelled his/her seat.
What if the railways book tickets randomly ? A train is a moving object which moves around at a speed of around 100km/hr on rails.
So there are a lot of forces and mechanics acting on the train.
Just imagine if S1, S2, S3 are completely full and S5, S6 are completely empty and others are partially full. When the train takes a turn, some coaches face maximum centrifugal force and some minimum, and this creates a high chance of derailment of the train.
This is a very technical aspect, and when brakes are applied there will be different braking forces acting at each of the coaches because of the huge differences in weight of coach, so stability of train becomes an issue again.
I felt that this is a good information worth sharing, as often passengers blame the Railways citing inconvenient seats/ berths allotted to them.//
I have received this info in whatsapp...
Is this info true?

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May 22 2016 (11:35)
~   540 blog posts
Re# 1858126-8              
Vestibule has nothing to with it,,,,, I was only giving example according to this post about centre of gravity & equal load distribution
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May 22 2016 (13:41)
Vinay Kumar   23030 blog posts
Re# 1858126-9              
Whn DRNTO was non-stop, wht different quota different coach gonna get??
Quota allocation cnt make complete coach empty (nt just 1 bt complete)!!
The basic reason for it is..if u keep coach open for few passenger, the operating cost upsurge, while in non-booked status, it remain close & operating cost remain controlled!! Thats y same quota coach gets filled first b4 opening next coach (the reason as people get SLB in GR or no LB in Rajdhani/DRNTO, even whn 300-700 (GR) empty berth remains is this)!!
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May 22 2016 (17:54)
AZT~
AZT~   3192 blog posts
Re# 1858126-10              
Well I experienced this myself so I believe in it. I have a habit of booking tickets at zero date so I always get seats in the middle of a coach. Unless you can give another explanation, we may not know the exact reason.
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May 22 2016 (18:05)
AZT~
AZT~   3192 blog posts
Re# 1858126-11              
Obviously in past years this logic wasn't applicable for non-stop durontos. Then other factors will determine the seat allocation. Since there are other algorithms at work, its not possible that one coach is fully packed & other coach is completely empty. Everybody wishes to get lower berths so only after allocation of LB, the other berths will be filled. And I don't know whether the operating cost will change if some coaches are locked & rest are open. I haven't seen such train till now.
Also you can't compare the seat allocation of GR with Raj/Dur. Since there is no quota in GR, so a 20-year boy can get Lower & a senior citizen can get Side Upper. Since these quotas
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are applicable for Raj/Dur, one may not get LB as it may be under different quota.

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May 22 2016 (23:37)
Vinay Kumar   23030 blog posts
Re# 1858126-12              
M not comparing GR with Raj/DRNTO!!
I have witnessed LKO Shatabdi with 2 Coach completely empty, non-AC functioning & no light on while traveled frm LKO to NDLS & have immense time seen the same for BSB Garib Rath!!
@ Any non peak season, u easily can shift into any empty non-booked or slight booked berth in DEE-YPR DRNTO, while few remain stuffed to complete extent!! Its all no bluff or guess but real travel & booking experience!! For GR, even if its 700+ berth available, if other coach booking hasnt started, u
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never gonna get LB!!

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