Then: EC of 46 seats each: 0 (subsequently 1), CC of 67/70 seats each: 5 (Subsequently 6), EOG 2
Now: EC of 56 seats each: 2, CC of 78 seats each: 7, EOG 2
Then: Seating capacity: EC: 0 (subsequently 46) , CC: 335-350 (subsequently 402-420)
Now: Seating capacity: EC: 112, CC: 546
Then:...
more...

5000 HP WAP-4 loco
Now: 6000 HP WAP-7 loco
Then: Max. Permissible Speed 130 kmph between HWH GMO
Now: MPS 130 kmph between HWH DHN avoids GMO
Then: Coaches capable of 130 kmph
Now: Coaches capable of 160 kmph
Then: Loco cpable of 140 kmph for certain weight and number of loco(s)
Now: Loco cpable of 140 kmph for certain weight and number of loco(s)

Whichever is higher between Speed of fastest train running in the section (kmph) and maximum permissible sectional speed:
NDLS CYZ 29 km length 110 (NDLS - New Delhi, CYZ - Chipyana Buzrung). RDSO has been requested to corroborate the track quality fit for raising sectional speed to 130 kmph.
CYZ NEWC ...
more...

130
NEWC PKA Except Gurpa Gaghandi 130 (PKA - Pradhankhunta)
PKA HWH 130 via Dankuni because 250 km (HWH – Howrah)
Source (may be wrong): Railway Board: Raising of sectional speed to 130 kmph on the routes of Golden Quadrilateral and the diagonal routes. 17 Dec 2019
----------------------
Gurpa (Gaya end) – Gujhandi (Dhanbad end) is a 22 km long Ghat section ... Trains pass through this Ghat section at a maximum permissible speed of 80 kmph – inside tunnels at restricted speed of 65 kmph. The trains also touch the speed of 100 kmph in a short stretch of approximately 03 km distance …
Source after last margine (May be wrong): East Central Railway Facebook About ECR 11 July 2019
----------------------
PERMISSIBLE MAXIMUM SPEED IN DIFFERENT SECTION
SDAH NORTH
SDAH-NH-SDAH SUB LINE : UP LINE 95 KMPH, DN LINE KMPH 95 KMPH, MAIN LINE [+ COM/LINE ] : UP LINE 90 KMPH DN LINE 90 KMPH SDAH – DDJ is its part. (SDAH - Sealdah, NH – Naihati Jn, DDJ – Dum Dum Jn)
DDJ-DKAE-DDJ MAIN LINE [+ COM/LINE ] : UP LINE 90 KMPH DN LINE 90 KMPH (DDJ – Dum Dum Jn, DKAE - Dankuni)
Source after last margine (May be wrong): Eastern railway Website - chalak Patra Apr June 2019, ELECTRIC/OPERATION/SDAH
-----------------------
Mughalsarai (Presently DD Upadhaya Jn) Patna Hathidah (near Mokama) Sitarampur Jn (near Asansol)
: 110 confirmed by SIMRAN in 2011-12 (certified by RDSO for 120 in 1993 with a request for giving attention for some parts. Upto RJPB : 110 by RDSO in April 2012). Maybe As per Times Of India Jan, 9, 2020 PATNA: The East Central Railway (ECR) has approved the proposal of Danapur division to increase the speed limit of all mail and express trains up to 130 kmph on the Jhajha-Patna Junction-Pt Deendayal Upadhaya Junction mainline section from April 30. The Railway Board has given its nod to the proposal. At present all mail and express trains, including Rajdhani Express, are running at the speed limit of 110 kmph between Jhajha and Pt Deendayal Upadhaya Junction route. Sources after last margine wrong?
_____________
Section Line Maximum sectional speed
LKO CNB UP 100 (LKO – Lucknow, CNB – Kanpur)
CNB LKO DN 100
Source after last margine (May be wrong): NCR website - Wagon - Sanction for regular operation of roller rake composed of 21BRN/BRNA/BRNAHS wagons carrying … over all BG sections of N.C.Rly at a maximum speed of 60 kmph. - Track BridgeJSC RDSO Speed Cert. 2015
---------------------
Whichever is higher between Speed of fastest train running in the section (kmph) and maximum permissible sectional speed:
NDLS TKD120 (Tuglakabad TKD) 120 RDSO has been requested to corroborate the track quality fit for raising sectional speed to 130 kmph
TKD PWL 160
PWL MTJ 160
MTJ) NAD 130 (Mathura - MTJ, Nagda - NAD)
NAD RTM 130 (Ratlam RTM)
RTM LIMKHEDA 100
LIMKHEDA GODHRA 110
GODHRA VIRAR 130
VIRAR BORIVALI 26 km length 110
BORIVALI BCT/MMCT/ Mumbai Central 30 km stretch 100
Source after last margine (May be wrong): Railway Board: Raising of sectional speed to 130 kmph on the routes of Golden Quadrilateral and the diagonal routes. 17 Dec 2019

Whichever is higher between Speed of fastest train running in the section (kmph) and maximum permissible sectional speed:
Chatrapati Shivaji Mahraj Terminus – Kasara 105. As per The Indian express Jun 13, 2018 (may be wrong), the CR plans to increase the sectional speed limit to 110 kmph by 2018-19. As per a source (maybe wrong) about "... PUSH PULL OPERATION ..." of September 2019: 105 KMPH
Kasara – Igatpuri 16 km stretch 55 (60)
Igatpuri...
more...

Wardha 110
Wardha Nagpur 120
Nagpur Jharsuguda 110 Proposed for 130 kmph sectional speed. It is being tried and proposal may be fulfill in future.
Jharsuguda Howrah 110 /130 (Kharagpur – Andul increased to 130 later - not written in the source, rest 110) (via Tatanagar but not written in source)
Proposed for raising of speed to 130 kmph from Andul to Kharagpur & from Kharagpur to Tata sent to CRS on 28.11.19 & 11.11.19 respectively.
Source (may be wrong) after last margine for Wardha Nagpur: Railway Board: Raising maximum permissible speed of sections. 21 March 2018 and source for other: Railway Board: Raising of sectional speed to 130 kmph on the routes of Golden Quadrilateral and the diagonal routes. 17 Dec 2019
----------------
20-09-2020
SOUTH EASTERN RAILWAY ACCELERATES SECTIONAL SPEED LIMIT
दक्षिणपूर्वरेलवे
SOUTH EASTERN RAILWAY
प्रेसविज्ञप्ति
PRESS RELEASE
SOUTH EASTERN RAILWAY ACCELERATES SECTIONAL SPEED LIMIT
Kolkata, 20thSeptember, 2020:
South Eastern Railway,in a bid to make high-speed movement of train services for reaching the passengers and goods totheir destinations faster,has decided to accelerate the maximum permissible sectionalspeed limitfrom 110 kmph to 130 kmph in up, down and middle lines between Andul and Kharagpur stations (102 km)on Howrah-KharagpurSection in Kharagpur Division.
Source of the above information after last margin may be wrong
------------------------------------
Whichever is higher between Speed of fastest train running in the section (kmph) and maximum permissible sectional speed:
Howrah Bhadrak 110 (Primary proposal for 130 kmph sectional speed)
Bhadrak Duvada (DVD) (via Palasa but not written in source) 110 Track Strengthening work under progress for 130 kmph sectional speed
Duvvada Vijayawada 110 Track Strengthening work under progress for 130 kmph sectional speed
Vijayawada Gudur 110 Track Strengthening work under progress for 130 kmph sectional speed
Gudur Chennai 110 (Awaiting speed certificate for COCR trial)
Source after last margine (May be wrong): Railway Board: Raising of sectional speed to 130 kmph on the routes of Golden Quadrilateral and the diagonal routes. 17 Dec 2019
---------------------------------
As such, including both the Up and Down lines in these sections, a total of 2,824 kms (1412Rkms)has now been made fit to run at a speed of 130 kmph. This covers the entire GQ-GD route over SCR, except Vijayawada - Duvvada section, where signaling up-gradation work is in progress.
Source after last margine (May be wrong): Indian Railway enhances Speed to 130 Kmph Along the Golden Quadrilateral & Golden Diagonal sections

A total of 2824 Kms (including Up &Down Lines)over South Central Railway Zone is now fit to run at 130 Kmph speed
Posted On: 09 JAN 2021 5:53PM by PIB Delhi. Posted on FB on same day.
----------------------------
Existing Max Permissible Sectional Speed (in Kmph);
BHC- KUR 110 (BHC – Bhadrak, KUR – Khurda Road)
KUR - PSA 110 (PSA-Palasa)
KUR - PUI (Puri. PUI is not a station code for passenger) 110 Speed from 95 to 110 raised in 2014-15 & SIL-DEG DN raised from 75 to 110kmph in 2015-16
Source (May be wrong): ECR - About us of engineering Dept, Time – maybe just after FY 2017-18 as some other data of that year in that document
-------------------------------------
Whichever is higher between Speed of fastest train running in the section (kmph) and maximum permissible sectional speed:
AGC LAR part of TKD LAR 130 (AGC Agra Cantt, LAR – Lalitpur)
LAR BINA 120 (Proposal for raising of speed upto 130 kmph, CRS has given observation
BINA JHP (Jujharpur) (Near Itarsi) 120 (Proposal for raising of speed upto 130 kmph is under preparation)
JHP BPQ (Balharshah) except Dharakhoh Maramijhiri, Chichonda Teegaon not written in source 120(65 Ghat)
BPQ - KZJ (Kazipet) 120 (Proposed for enhancement of speed to 130 kmph. It is being tried and proposal may be fulfill in future.)
KZJ-BZA (Vijayawada) 120 (Track strengthening work under progress for130 kmph sectional speed)
BZA Gudur (GDR) 110 (Track strengthening work under progress for130 kmph sectional speed)
GDR Chennai Central (MAS) 110 (Awaiting speed certificate for COCR trial)
Source after last margine (May be wrong): Railway Board: Raising of sectional speed to 130 kmph on the routes of Golden Quadrilateral and the diagonal routes. 17 Dec 2019
---------------------------------------
Dharakhoh Maramijhiri & Teegaon Chichonda: ascending the ghat: – unknown but by RDSO: a) 60 for ICF rake on 21.7.11 which is amendment of 29.1.10. b) 65 for ICF rake in May 2011.
Maramijhri- Dharkhoh & Chichonda- Teegaon descending the ghat section: unknown but 75 by RDSO in February 2012
Sources after last margine may be wrong
---------------------------------------
SECTION WISE DETAILS OF MAX PERMISSIBLE SECTIONAL SPEEDs
Existing Max Permissible Sectional Speed:
BIN-LARDN 120
LAR-BIN UP 120
LAR-DHO DN 130
DHO-LAR UP 130
Source after last margin: NCR website - ENGINEERING _ ETKMs & ITKMs:

North Central Railways / Indian Railways Portal CMS Team Last Reviewed on: 03-07-2020
BIN (inernal code – not for passengers?) – BINA JN, LALITPUR JN – LAR, DHAULPUR - DHO
---------------------------------------
Accordingly, the South Central Railway zone has received sanction to enhance the maximum speed limits to 130 kmph:
i. Ballarshah to Kazipet – 234 Rkm
ii. Kazipet-Vijayawada-Gudur – 510 Rkm
Sourceafter last margin (Maybe wrong): Indian Railway enhances Speed to 130 Kmph Along the Golden Quadrilateral & Golden Diagonal sections

A total of 2824 Kms (including Up &Down Lines)over South Central Railway Zone is now fit to run at 130 Kmph speed
Posted On: 09 JAN 2021 5:53PM by PIB Delhi. Posted on FB on same day.
----------------------
SECTIONAL SPEED:
NZM-AGC:160KMPH,AGC-LAR:130KMPH,LAR-BPL:120KMPH,BPL-IGP:110KMPH,IGPKSA:
60KMPH,KSA-CSTM:105KMPH
NZM - HAZRAT NIZAMUDDIN, AGC AGRA CANTT, LAR- LALITPUR, BPL – BHOPAL JN, IGP – IGATPURI, KSRA/ KSA – KSARA, CSTM CST MUMBAI (later CSMT – C SHIVAJI MAHARAJ T)
Source (May be wrong): COMPENDIUM ON PUSH PULL OPERATION OF WAP5/WAP7 LOCOMOTIVES OVER INDIAN RAILWAYS
Issued in – September 2019
-----------------------------
Whichever is higher between Speed of fastest train running in the section (kmph) and maximum permissible sectional speed:
Kalyan Karjat 105
Karjat Palasdari 3 km length 80
Palasdari Lonavala 25 km stretch 60 (Ghat)
Lonavala Pune 110
Pune Daund 110
Daund Solapur 110
Solapur Wadi 110
Wadi Gooty 130
Gooty Renigunta 130
Renigunta Chennai 105 Track Strengthening work under progress for 130 kmph sectional speed (As per other source AJJ-RU 110 target year 2011-12, As per other source Chennai Central – Arakkonam in all parts at least for two lines: 105 in 9.13)
Source (May be wrong) after last margine (Except Wadi Gooty, Gooty Renigunta): Railway Board: Raising of sectional speed to 130 kmph on the routes of Golden Quadrilateral and the diagonal routes. 17 Dec 2019
---------------------------
Accordingly, the South Central Railway zone has received sanction to enhance the maximum speed limits to 130 kmph: along the following routes:
i. Renigunta to Gooty - 281 Rkm
ii. Gooty to Wadi - 255Rkm
Source after last margin (Maybe wrong): Indian Railway enhances Speed to 130 Kmph Along the Golden Quadrilateral & Golden Diagonal sections

A total of 2824 Kms (including Up &Down Lines)over South Central Railway Zone is now fit to run at 130 Kmph speed
Posted On: 09 JAN 2021 5:53PM by PIB Delhi. Posted on FB on same day.
----------------------------
Increase in max permissible sectional speed:-
Increasing sectional speed from 105 to 110 kmph DAUND JN (DD)- SOLAPUR JN (SUR) BG section. sanction dt. 06.07.2018.
Increasing sectional speed from 105 to 110 kmph DAUND JN (DD)-MANMAD JN (MMR) BG section. sanction dt. 02.07.2018.
Increasing sectional speed from 100 to 110 kmph KURDUVADI (KWV) – MIRAJ JN (MRJ)BG section. sanction dt. 02.07.2018.
Source after last margine (May be wrong) : Central Railway / Indian Railways Portal CMS Team Last Reviewed on: 15-03-2019
-------------------------------------
The Indian express Jun 13, 2018 (Source may be wrong)
We have already increased speed limit between Itarsi-Balharshah on the Delhi-Chennai sector to 120 kmph, while work on the remaining sections is on,” a senior CR official said.
In a presentation made by the CR General Manager D K Sharma to the Railway Board on May 30, the CR plans to increase the sectional speed limit to 110 kmph by 2018-19.
These sections include Diva-Panvel-Roha, .., Pune-Miraj-Kolhapur, .., Manmad to Solapur, Chhatarapati Shivaji Maharaj Terminus-Kasara and Boisar-Diva.

Hathidah (near Mokama) Guwahati/ Dibrugarh Town: Barsoi to New Jalpaiguri is mostprobably 100, New Jalpaiguri to Guwahati is mostprobably 100 or 105 or varies between 100 & 105 or something between 100 & 105 by SIMRAN (certified for other than c&M1 Vol I in Hathidah Guwahati/ Dibrugarh Town by RDSO is 105)
-------------
Kazipet Secunderabad: Already, the maximum speed limits in the High-Density Network (HDN) between Secunderabad – Kazipet (132 Kms distance) had been enhanced to 130 kmph.
Source...
more...

after last margin (Maybe wrong): Indian Railway enhances Speed to 130 Kmph Along the Golden Quadrilateral & Golden Diagonal sections

A total of 2824 Kms (including Up &Down Lines)over South Central Railway Zone is now fit to run at 130 Kmph speed
Posted On: 09 JAN 2021 5:53PM by PIB Delhi. Posted on FB on same day.
RDSO Certified: 120 on 29.1.02 which was amended on 11.12.2006
-------------
Secunderabad Vikrabad: up: less than or exactly 105 km/h, , Dn: less than or exactly 110 km/h, (By RDSO: i) 120 on 9.6.1994, one line then? ii) up 105 km/h, Dn 110 km/h on 29.1.02 which was amended on 11.12.2006)
Vikrabad Wadi: less than or exactly 105 (105 by RDSO)
Wadi Gooty: 130 Source (may be wrong) of 09 JAN 2021 written in other place
Gooty Dharmavaram: less than or exactly 105 (105 by RDSO)
Dharmavaram Penukonda Jn mostprobably not via SSPN : as per unofficial website 120 (By RDSO: i) 120 January 2000, ii) 130 on 29.1.02 which was amended on 11.12.2006)
Penukonda Jn Yelahanka: 120? (By RDSO: i) 120 January 2000, ii) 130 on 29.1.02 which was amended on 11.12.2006)
Yelahanka Bangalore: actual speed is unknown (130 by RDSO on 29.1.02 which is amended on 11.12.2006)
New Delhi- Naya Azadpur: unknown but not more than 100 by SIMRAN
Sources of above may be wrong
-------------------------------------------------------
Naya Azadpur- Ambala -Jalandhar City – Amritsar: 110 was confirmed by SIMRAN and going to be increased upto130 soonupto Ludhiana , or maybe already 130 upto Ludhiana with the introduction of Vandhe Bharat(?) in New delhi – Ambala – Ludhiana [By RDSO: i) Naya Azadpur Ambala: 130 July 2011 ii) Ambala Ludhiana: 130 in July 2011 iii) Ludhiana- Jalandhar City- Amritsar: 120 September 2003]
Ambala Chandigarh: 110 by SIMRAN (120 by RDSO in 10.9.98, September 2003).
As per TIMES OF INDIA (Source may be wrongI: TNN | Updated: Aug 12, 2019, 11:34 IST: The New Delhi-Ambala and Ambala-Ludhiana sections are certified for 130 kmph, but the approval is yet to be received for Ambala-Chandigarh route.
Apr 18, 2017 Hindustan Times At present, the Shatabdi Express covers the distance in 3.30 hours, running at a speed of 110 kmph. “We have sent a proposal to the commission of railway safety, asking it to reduce the travel time of Shatabdis running between Chandigarh and Delhi. As per our proposal, the train will run at 130 kmph between Ambala and Delhi …
Above sources after last margin may be wrong
------------------------------------------------------
Jalandhar City Pathankot- unknown (110 by RDSO in September 2003)
12951 / 12952 New Delhi – Mumbai Central Rajdhani Express, 12953 /12954 A. K. Rajdhani Express, 12009 / 12010 Ahmedabad – Mumbai Central Shatabdi Express will run at 130 kmph o¬n Virar - Godhra & Virar – Ahmedabad sections from 120 kmph, due to improvement in infrastructure.Source (May be wrong): Western Railway website, 29-09-2015. Mostprobably Maximum Permissible Speed of Vadodara – Ahmedabad was 110 kmph and not 120 kmph so, increasing of speed upto 130 kmph from 120 kmph mentioned in this source mostprobably excludes Vadodara – Ahmedabad part of Virar – Ahmedabad section though Vadodara – Ahmedabad may be certified for 130 kmph by RDSO, which may be higher than operational mostprobably 110 kmph.
Vadodara Ahmedabad: 110 (By RDSO: i) 130 in Oct 1997, July 2008, August 2008, (130 by RDSO 8.4.16) ii) 110 in November 2002) june july 2012 speed in curves may be less than 120 but shall not exceed 120 for AC Double Decker
Ahmedabad Godhra: actual is unknown. (130 by RDSO in July 2008, August 2008)
Chhatrapati Shivaji Terminus –Roha: unknown (120 by RDSO in December 2004). As per The Indian express Jun 13, 2018 (May be wrong), the CR plans to increase the sectional speed limit of Diva- Panvel- Roha to 110 kmph by 2018-19
Roha Madgaon: mainly 110, maybe slightly more in a part or some parts but not more than 115 by SIMRAN. 120 at past (By RDSO: i) 120 April 2002, December 2004 ii) 150 in March 2003)
Madgaon Thokur: Mainly 110 is confirmed by SIMRAN, maybe slightly more in a part or some parts but not more than 115 (120 by RDSO April 2002, December 2004)
Thokur Mangalore: less than or exactly 120 (120 by RDSO December 2004)
Patelnagar Rewari: Mostprobably 110 (110 by RDSO in May 2012,110 by RDSO in June 1995 between Delhi Cantt & Rewari)
Above sources after last margin may be wrong
-------------------------------------------------------------------
MAX.P.SPEED
RE-AWR(DN) 110 [REWARI (RE)]
RE-AWR(uP) 110
AWR.BKI 110
BKI-JP (UP) 100 [JAIPUR (JP)]
BKI-JP (DN) 110
JP-FL (UP) 110
JP-FL (DN) 110
FL-MD (UP) 110 [MADAR (MD)]
FL-MD(DN) 100
R.P.C. 100 Mostprobably, R.P.C. 215 Km is Rewari - Phulera Chord (RPC) via Ringas
NORTH WESTERN RAILWAY JAIPUR DIVISION COMMERCIAL/ MAINTENANCE FACILITIES MAP - comparing with a map of 01.40.2017, it can be told that it is clearly before 01.04.2017 as some under construction work in this map is completed in the Jaipur Division System Map of 01.04.2017. As RDSO certified is 110 in 07.05.2012 and RDSO certified is greater than or equal to Max P Speed, sections having 110 kmph as per mentioned above had 110 kmph Max P speed at least sometime during may 07.05.2012 to 01.04.2017. (Maybe wrong)
--------------------------------------------------------
MAX. SECTIONAL SPEED.
SECTION KMPH
MADAR-PALANPUR (Excl) 110 MADAR is near AJMER
AJMER-MADAR(DN) 90
Source (May be wrong): ORGANISATION OF ENGINEERING DEPARTMENT AT AJMER, time is not mentioned but some other subject of the source was upto 31.3.13
-------------------------------------------------------------
Ahmedabad Palanpur: unknown (130 by RDSO 8.4.’16)(source wrong?)

Naganahalli-Mysore (BG New Double line) Present Speed.(kmph) 70, Proposed speed
(kmph)100, Sanction under process at Hqrs. TDC – 31.7.2016
Birur – Ajjampura (New Down Line) Present Speed.(kmph) 80, Proposed speed
(kmph)100 Speed in Sept 2014 increased
Ajjampura-Hosadurga...
more...

(New Down Line) Present Speed.(kmph) 80, Proposed speed
(kmph)100 Proposal submitted to Hqrs on 06.10.2015. TDC – 31.8.2016
Hosdurga-Chikjajur (New Down Line) Present Speed.(kmph) 100, Proposed speed
(kmph)100 Residual works in progress. CRS sanction to be processed. TDC – 30.9.2016
Source (May be wrong): South Western Railway CMS Team Last Reviewed on: 20-12-2017
-----
SWR website:
Civil Engineering Branch
STATUS OF INCREASING OF SECTIONAL SPEED (2020-21):
RRB-JRU 110 05.11.2020
SPGR-ASK (ASK-RDI = 100 RDI-SPGR = 95) Pro speed 110 Speed trial conducted on 05.10.2020.
Above source after last mergine may be wrong
CHIKJAJUR JN- JRU
BIRUR JN- RRB
SAMPIGE ROAD- SPGR
ARSIKERE JN- ASK
Source : South Western Railway CMS Team Last Reviewed on: 23-11-2020
-----
Thiruvananthapuram Kollam: 95 in some parts, 100 in some parts by SIMRAN around 2012 (wrong source?)
--------------
AJJ-RU 110 (target year 2011-12) as per another source (maybe wrong), Railway Board: Raising maximum permissible speed of sections. 21 March 2018 it is still 105
VANIYAMBADI (VN) – JOLARPETTAI (JTJ) 100 to 110 target in 2011-12 Raising of speed
IRUGUR (IGU)- COIMBATOREJN (CBE) 70 to 90 target in 2011-12 Raising of speed
SHORANUR JN (SRR) – MANGALORE (MAQ): 100 TO 110 target in 2011-12 (done) Raising of speed
MAQ – THOKUR (TOK): 65 (guessed by seeing some of other parts of the document, the time was2011)
ERNAKULAM JN (ERS) – ALAPPUZHA (ALLP): 90 (guessed by seeing some of other parts of the document, the time was2011)
SRR – ERS: 80 (guessed by seeing some of other parts of the document, the time was2011)
ALAPPUZHA (ALLP) – KAYANKULAM (KYJ): 90 (guessed by seeing some of other parts of the document, the time was2011)
Source (May be wrong): Raising of Maximum Permissible Speed by searching in Southern railway website
----------------------------------------------------------
Shoranur Mangalore: at least some parts 110, rest part unknown but not more than 110 by SIMRAN around 2012
Muzaffarnagar Meerut city: 110 by SIMRAN around 2012
Moradabad Lucknow: at least some parts 105
Lucknow Sultanpur Varanasi: at least some parts 110 by SIMRAN around 2012
Sealdah Dumdum Jn: unknown but nowhere more than 110 by SIMRAN around 2012
Haridwar Dehradun: 65 or 70 (SIMRAN around 2012)
Sabzi Mandi- Naya Azadpur: presently it is unknown but mostprobably not more than 100 (SIMRAN around 2012), earlier, according to Delhi Div map (1/4/2004), it was 110
Above sources after last margin maybe wrong
---------------------------------------------------------------
Chennai Central – Arakkonam Jn. Up Fast 105, Dn fast 105, (Chennai Central - PATTABIRAM Dn Slow105; Up Slow 105, PATTABIRAM - Thiruvallur 3rd Line 105; 4th Line at first 105 afterthat 100 thereafter 105, Thiruvallur - Arakkonam Jn. 3rd Line 70, TIRUVALANGADU - Arakkonam Jn. 4th Line 90)
Arakkonam Jn. – THALANGAI Dn 105, Up 105
THALANGAI - WALAJAH ROAD JN Dn 105, Up 105
WALAJAH ROAD - JOLARPETTAI JN Dn 105, Up 105 As per other source (may be wrong) - Raising of Maximum Permissible Speed by searching in Southern railway website - VANIYAMBADI (VN) – JOLARPETTAI (JTJ) 100 to 110 target in 2011-12 Raising of speed
Arakkonam Jn. - Renigunta Jn. (including Malpakkam Bypass) Dn 105, Up 105
Source after last mergin (May be wrong): Joint Safety Certificate 9.13 – a part of CRS Speed Certificate (.ppt file) not earlier than 2018 and not later than 2019
-------------------
Jolarpettai yard (Chennai Div/SR) has been modified & upgraded Now, speed increase at 110 kmph instead of existing 15 kmph. Source(May be wrong): Ministry of railways, Government of India, facebook, 3.6.20
------------------------
Chennai – Jolarpettai, Chennai – Renigunta and Chennai – Ongole section speed to be increased to 130 kmph from 110 kmph
Source after last mergin (May be wrong): THE NEW INDIAN EXPRESS: 27th March 2018

Probably - List of withdrawn Shatabdi (without brief discussion and source):
2025/2026 Bangalore city Hubli during 1995-96
New Delhi - Kathgodam in 1995 and/or1996 (present one was introduced after a long time of withdrawing).
203x/203x (x=?) Secunderabad Rajhmundry (during 1999)
2023/2024...
more...

Chennai central Coimbatore during 1995-2000)
New Delhi Bhatinda via Ambala Cantt. (in 2002).
New Delhi Breilly during 2002 and/or 2003
2021/2022 Howrah Rourkela, (between Howrah and Rourkela during 1995-2002, between Howrah and Tatanagar during 2002-03
2023/2024 Howrah Patna (2001-2003)
2027/2028 Mumbai CST Pune (1995-2004).
12035/12036 Jaipur - Agra Fort (2012-2018).
Chennai central - Tirupati was in time table 1999 but most probably was not introduced. Its announcement may be in Rail Budget 1995 online.