How does train bogie/ coach travel in curve

1.The wheels on each side of a train car are connected with a metal rod called an axle. This axle keeps the two train wheels moving together, both turning at the same speed when the train is moving. ... This is where the wheels' geometry comes in. To help the wheels stay on the track their shape is usually slightly conical.
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2.The only part of a train wheel that actually touches the rail is around the size of a 10 cent/20pence coin. Think about that the next time you're hurtling along at 130Kph. Actually - the wheel flange very rarely touches the rail. What keeps the train on the track is the conical angle of the wheel profile.
3. Why do trains not derail?
the reason these trains never tip is also because of their conical wheels. The conical wheels' shape, every time the train tips, the amount that it tips acts to restore the train upright. This force, called a restoring force, is stronger when the train is heavier meaning heavier trains are more stable .
Source - science journal

Please read full blog. It took a lot of effort in compiling it. Please suggest changes if any

TRAINS COVERING LONGEST AND SHORTEST DISTANCES CURRENTLY (CATEGORY WISE)

LONGEST RAJDHANI SERVICE: 12431/31 TVC NZM...
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Rajdhani Express (2844 km)
SHORTEST RAJDHANI SERVICE: 12425/26 JAT NDLS Rajdhani Express (577 km)

LONGEST SHATABDI SERVICE: 12001/02 HBJ NDLS Shatabdi Express (709 km)
SHORTEST SHATABDI SERVICE: 12847/48 DGHA HWH Super AC Express (185 km)

LONGEST DURONTO SERVICE: 12283/84 ERS NZM Duronto Express (2639 km)
SHORTEST DURONTO SERVICE: 22201/02 SDAH PURI Duronto Express (518 km)

LONGEST GARIB RATH SERVICE: 12611/12 MAS NZM Garib Rath Express (2175 km)
SHORTEST GARIB RATH SERVICE: 12209/10 CNB KGM Garib Rath Express (413 km)

LONGEST HUMSAFAR SERVICE: 12503/04 AGTL BNC Humsafar Express (3534 km)
SHORTEST HUMSAFAR SERVICE: 22437/38 PRYJ ANVT Humsafar Express (622 km)

LONGEST ANTYODAYA SERVICE: 22877/78 HWH ERS Antyodaya Express (2288 km)
SHORTEST ANTYODAYA SERVICE: 15551/52 DBG BCY Antyodaya Express (405 km)

LONGEST TEJAS SERVICE: 22119/20 CSMT KRMI Tejas Express (552 km)
SHORTEST TEJAS SERVICE: 22671/72 MDU MS Tejas Express (493 km) [tied with 82901/02 MMCT ADI Tejas Express (493 km)]

LONGEST UDAY SERVICE: 22665/66 CBE SBC UDAY Express (419 km)
SHORTEST UDAY SERVICE: 22701/02 VSKP BZA UDAY Express (350 km)

LONGEST JAN SHATABDI SERVICE: 12051/52 DR MAO Jan Shatabdi Express (572 km)
SHORTEST JAN SHATABDI SERVICE: 15125/26 Kashi Patna Jan Shatabdi Express (233 km)

LONGEST S. KRANTI SERVICE: 12217/18 Kerala Sampark Kranti Express (3090 km)
SHORTEST S. KRANTI SERVICE: 15035/36 Uttaranchal Sampark Kranti Express (277 km) [15035/36-Slip Uttarakhand Sampark Kranti Express (238 km)]

LONGEST VANDE BHARAT SERVICE: 22435/36 NDLS BSB Vande Bharat Express (759 km)
SHORTEST VANDE BHARAT SERVICE: 22439/40 NDLS SVDK Vande Bharat Express (655 km)

LONGEST D. DECKER SERVICE: 22707/08 TPTY VSKP Double Decker Express (760 km)
SHORTEST D. DECKER SERVICE: 12985/86 DEE JP Double Decker Express (304 km)

LONGEST SUPERFAST SERVICE: 12507/08 TVC SCL Aronai Express (3925 km) [tied with 12515/16 TVC SCL Express (3925 km)] (to be replaced by Vivek Express when regular services are restored with regular train numbers)
SHORTEST SUPERFAST SERVICE: 22145/46 PVR MRJ SF Express (UR) (137 km)

LONGEST MAIL/EXP SERVICE: 15905/06 DBRG CAPE Vivek Express (4219 km) (to be replaced by Himsagar Express when normal services are restored with regular train numbers)
SHORTEST MAIL/EXP SERVICE: 19731/32 JP FL Express (UR) (55 km)

LONGEST PASSENGER SERVICE: 58111/12 TATA ITR Passenger (877 km)
SHORTEST PASSENGER SERVICE: 53375/76 BRKA SDWR Passenger (UR) (6 km)

Please read full blog. It took efforts in compiling data. If there are any changes, please inform.

TRAINS HAVING HIGHEST AND LOWEST AVERAGE SPEEDS CURRENTLY (CATEGORY WISE)

RAJDHANI WITH HIGHEST AVG: 12951...
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MMCT NDLS Tejas Rajdhani Express (89 km/h)
RAJDHANI WITH LOWEST AVG: 20506 NDLS DBRG Rajdhani Express (57 km/h)

SHATABDI WITH HIGHEST AVG: 12034 NDLS CNB Shatabdi Express (88 km/h)
SHATABDI WITH LOWEST AVG: 12039/40 NDLS KGM NDLS Shatabdi Express (50 km/h)

DURONTO WITH HIGHEST AVG: 22209 MMCT NDLS Duronto Express (82 km/h)
DURONTO WITH LOWEST AVG: 22202 PURI SDAH Duronto Express (60 km/h)

GARIB RATH WITH HIGHEST AVG: 12909/10 BDTS NZM BDTS Garib Rath Express (82 km/h)
GARIB RATH WITH LOWEST AVG: 12210 KGM CNB Garib Rath Express (44 km/h)

HUMSAFAR WITH HIGHEST AVG: 12275/22437 PRYJ ANVT Humsafar Express (82 km/h)
HUMSAFAR WITH LOWEST AVG: 19669/70 UDZ PPTA UDZ Humsafar Express (50 km/h)

ANTYODAYA WITH HIGHEST AVG: 22877 HWH ERS Antyodaya Express (63 km/h)
ANTYODAYA WITH LOWEST AVG: 15552 BCY DBG Antyodaya Express (36 km/h)

TEJAS WITH HIGHEST AVG: 82501 LJN NDLS IRCTC Tejas Express (82 km/h)
TEJAS WITH LOWEST AVG: 22119 CSMT MAO Tejas Express (66 km/h)

UDAY WITH HIGHEST AVG: 22702 BZA VSKP UDAY Express (65 km/h)
UDAY WITH LOWEST AVG: 22666/22701 CBE SBC/VSKP BZA UDAY Express (61 km/h)

S. KRANTI WITH HIGHEST AVG: 12907/08 Maharashtra Sampark Kranti Express (82 km/h)
S. KRANTI WITH LOWEST AVG: 15035/36 Uttaranchal Sampark Kranti Express (41 km/h)

JAN SHATABDI WITH HIGHEST AVG: 12059 KOTA NZM Jan Shatabdi Express (77 km/h)
JAN SHATABDI WITH LOWEST AVG: 12037/38 Siddhabali Jan Shatabdi Express (37 km/h)

VANDE BHARAT WITH HIGHEST AVG: 22435/36 NDLS BSB Vande Bharat Express (95 km/h)
VANDE BHARAT WITH LOWEST AVG: 20825/26 BSP NGP BSP Vande Bharat Express (75 km/h)

D. DECKER WITH HIGHEST AVG: 12931/92 MMCT ADI MMCT Double Decker Express (71 km/h)
D. DECKER WITH LOWEST AVG: 12584/22707 ANVT LJN/VSKP TPTY Double Decker Express (57 km/h)

SUPERFAST WITH HIGHEST AVG: 12393 Sampoorna Kranti Express (80 km/h)
SUPERFAST WITH LOWEST AVG: 16595 Panchaganga Express (45 km/h)

MAIL/EXP WITH HIGHEST AVG: 14703 JSM LGH Express (61 km/h)
MAIL/EXP WITH LOWEST AVG: 13175 SDAH SCL Kanchanjungha Express (24 km/h)

PASSENGER WITH HIGHEST AVG: 54881 BME MBF Passenger (55 km/h)*
PASSENGER WITH LOWEST AVG: 54321 BLM STP Passenger (14 km/h) *

*Passengers not restored with original number.

Please read full blog. It took a lot of effort in compiling this data. Please inform changes if any.

TRAINS HAVING HIGHEST AND LOWEST NUMBER OF INTERMEDIATE STOPPAGES CURRENTLY (CATEGORY WISE)
(NO COVID SPECIALS)
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RAJDHANI WITH HIGHEST HALTS: 20505/06 NDLS DBRG Rajdhani Express (25)
RAJDHANI WITH LOWEST HALTS: 12425/26 NDLS JAT Rajdhani Express (3)

SHATABDI WITH HIGHEST HALTS: 12015/16 NDLS DOZ Shatabdi Express (9)
SHATABDI WITH LOWEST HALTS: 12007/08 MAS MYS Shatabdi Express (2)
12027/28 MAS SBC Shatabdi Express (2)
12034 NDLS CNB Shatabdi Express (2)
12045/46 NDLS CDG Shatabdi Express (2)

DURONTO WITH HIGHEST HALTS: 12259/60 SDAH BKN Duronto Express (9)
12283/84 NZM ERS Duronto Express (9)
DURONTO WITH LOWEST HALTS: 12265/66 DEE JAT Duronto Express (1)
22201/02 SDAH PURI Duronto Express (1)
22203/04 SC VSKP Duronto Express (1)
22213/14 SHM PNBE Duronto Express (1)

GARIB RATH WITH HIGHEST HALTS: 22883/84 PURI YPR Garib Rath (25)
GARIB RATH WITH LOWEST HALTS: 12593/94 BPL LJN Garib Rath (4)

HUMSAFAR WITH HIGHEST HALTS: 22497/98 SGNR TPJ Humsafar Express (35)
HUMSAFAR WITH LOWEST HALTS: 12275/76 NDLS PRYJ Humsafar Express (1)
22437/38 ANVT PRYJ Humsafar Express (1)

ANTYODAYA WITH HIGHEST HALTS: 22841/42 SRC MAS Antyodaya Express (26)
15559/60 ADI DBG Antyodaya Express (26)
ANTYODAYA WITH LOWEST HALTS: 15551/52 BCY DBG Antyodaya Express (7)

TEJAS WITH HIGHEST HALTS: 82901/02 MMCT ADI Tejas Express (7)
TEJAS WITH LOWEST HALTS: 22671/72 MS MDU Tejas Express (2)
82501/02 LJN NDLS Tejas Express (2)

UDAY WITH HIGHEST HALTS: 22701/02 VSKP BZA UDAY Express (7)
UDAY WITH LOWEST HALTS: 22666 CBE SBC UDAY Express (5)

S. KRANTI WITH HIGHEST HALTS: 12217/18 Kerala Sampark Kranti Express (20)
S. KRANTI WITH LOWEST HALTS: 12907/08 Maharashtra Sampark Kranti Express (3)

JAN SHATABDI WITH HIGHEST HALTS: 12023/24 HWH PNBE Jan Shatabdi Express (14)
JAN SHATABDI WITH LOWEST HALTS: 15125/26 Kashi Patna Jan Shatabdi Express (5)
12071/72 DR J Jan Shatabdi Express (5)

VANDE BHARAT WITH HIGHEST HALTS: 22439/40 NDLS SVDK Vande Bharat Express (3)
VANDE BHARAT WITH LOWEST HALTS: 22435/36 NDLS BSB Vande Bharat Express (2)

D. DECKER WITH HIGHEST HALTS: 22707/08 TPTY VSKP Double Decker Express (16)
D. DECKER WITH LOWEST HALTS: 12583/84 ANVT LJN Double Decker Express (3)

SUPERFAST WITH HIGHEST HALTS: 12833 HWH ADI SF Express (62)
SUPERFAST WITH LOWEST HALTS: 12451/52 Shram Shakti Express (1)

MAIL/EXP WITH HIGHEST HALTS: 13007 Udyan Abha Toofan Express (110) (to be replaced by BDTS DDN Express with 96 halts after permanent cancellation of 13007/08 and 13049/50)
MAIL/EXP WITH LOWEST HALTS: 14261/62 Ekatmata Express (Via Sultanpur) (3)

PASSENGER WITH HIGHEST HALTS: 53041 Dhuliyan Passenger (116)
PASSENGER WITH LOWEST HALTS: List contains 56 trains