Ø 1971 – MASTER PLAN PREPARED FOR CONSTRUCTION OF A MASS RAPID TRANSIT SYSTEM.
Ø 1972 – ON 1ST JUNE, THE MASS RAPID TRANSIT SYSTEM PROJECT WAS SANCTIONED.
Ø 1972 – FOUNDATION STONE OF METRO RAILWAY KOLKATA LAID ON 29THDEC.
Ø 1984 – ON 24TH OCTOBER, METRO RAILWAY, KOLKATA, INDIA’S FIRST METRO WAS COMMISSIONED.
COMMERCIAL SERVICES STARTED FROM ESPLANADE TO BHOWANIPUR (NOW NETAJI BHAVAN) FOR A
DISTANCE OF 3.4 KMS.
Ø 1995 – ON 27TH SEPTEMBER, THE TOTAL LENGTH OF 16.45 KMS FROM DUM DUM TO TOLLYGUNGE
STARTED FUNCTIONING BETWEEN 17 STATIONS.
Ø 2009 – ON 22NDAUGUST, PART OF THE NEW SECTION OF 5.89 KMS FROM MAHANAYAK UTTAM KUMAR
(PREVIOUSLY TOLLYGUNGE) TO KAVINAZRUL COMMISSIONED.
Ø 2010 – ON 7TH OCTOBER, THE REMAINING STRETCH OF THE NEW SECTION TO THE SOUTH, 1.58 KMS
FROM KAVI NAZRUL TO KAVI SUBHASH WAS COMMISSIONED.
Ø 2010 – ON 29TH DECEMBER, METRO RAILWAY WAS CONFERRED THE STATUS OF A ZONAL RAILWAY.
Ø 2013 - ON 10THJULY, A NEW SECTION FROM DUM DUM TO NOAPARA( 2.091KM) WAS COMMISSIONED.
Ø 2014 – FROM 21ST MAY, DEPARTURE OF FIRST TRAIN (PILOT CUM COMMERCIAL) FROM BOTH ENDS
STARTS AT 6:45 HRS IN LIEU OF 7:00 HRS FROM MONDAY TO SATURDAY.
Ø 2019 - from 7th july, SUNDAY SERVICES (PILOT CUM COMMERCIAL) STARTS FROM 09:00 HRS IN LIEU OF
Ø 2020 - 13TH February, inaugurated of phase-I of east west corridor between salt lake
sector v to salt lake stadium.
Ø 2021 - on 22ND February, a new section from noapara to dakshinesawr (4.139 km) was
Metro construction is of a very complex nature requiring application of several new technologies in the fields of civil, electrical, signaling and telecommunication engineering. Indian engineers, backed by their own experience and supplemented by their studies abroad, adopted advanced technologies in the following fields for the first time in India.
Cut and cover method of construction using diaphragm walls and sheet piles.
Use of extensive decking to keep the traffic flowing over the cut while construction in progress underneath.
Shield tunneling using compressed air and airlocks.
Ballastless track using elastic fastenings, rubber pads, epoxy mortar and nylon inserts.
Air-conditioning and ventilation system for environmental control of stations and tunnels.
Third Rail current collection system for traction.
Underground substations with dry type transformers and SF-6 circuit breakers.
Tunnel- Train VHF- radio communication system.
Micro-processor-based train control and supervisory remote control system for substations.
Automatic ticket vending and checking system.