Fastest trains of India (Zonewise list) (in end-to-end average speed and above 55 km/h)
Note: I've included PRE-COVID pandemic and COVID special status of trains.
CR (Central): 22221/22222 CSMT Hazrat Nizamuddin...
more... Rajdhani Express—86 km/h
ECoR (East Coast): 12281/12282 Bhubaneswar New Delhi Duronto Express—76 km/h
ECR (East Central): 12309/12310 Patna Rajdhani Express—83 km/h
ER (Eastern): 12249/12250 Howrah Anand Vihar Terminal Yuva Express—86 km/h
KR (Konkan): No tains found over 55 km/h
NCR (North Central): 12033/12034 Kanpur New Delhi Shatabdi Express—90 Km/h
NER (North Eastern): 82501/82502 Lucknow New Delhi IRCTC Tejas Express—82 km/h
NFR (Northeast Frontier): 12041/12042 Howrah New Jalpaiguri Shatabdi Express—70 km/h
NR (Northern): 22435/22436 Varanasi New Delhi Vande Bharat Express—95 Km/h
NWR (North Western): 12985/12986 Jaipur Delhi Sarai Rohilla AC Double Decker Express—69 Km/h
SCR (South Central): 12285/12286 Secunderabad Hazrat Nizamuddin Duronto Express—77 Km/h
SECR (South East Central): 22867/22868 Durg-Hazrat Nizamuddin Humsafar Express— 66 Km/h
SER (South Eastern): 20839/20840 Ranchi New Delhi Rajdhani Express via Bokaro—78 Km/h
SWR (South Western): 12213/12214 Yesvantpur Delhi Sarai Rohilla AC Duronto Express—75 km/h
SR (Southern): 22671/22672 Chennai Egmore Madurai Tejas Express—79 Km/h
WCR (West Central): 12059/12060 Kota Hazrat Nizamuddin Jan Shatabdi Express—77 Km/h.
WR (Western): 12951/12952 Mumbai Central New Delhi Rajdhani Express—89 Km/h