Metro has been planned for many cities in UP. Candidates are :
Metro City Population- 1991-2001-2011-2021(expected)-Status
(1) Gaziabad NCR- 5LAcs, 10 Lacs, 24 Lacs, (30-45 Lacs) -Operating
(2) Noida+Grano NCR- 1 Lacs, 3 Lacs, 7 Lacs (12-20) lacs -Operating
(3) Lucknow-17...
more... lacs, 22Lacs, 29 Lacs, (35-40) Lacs ) -Operating since a year
(4) Kanpur-20 Lacs, 27 Lacs, 29 LAcs, (31-35) lacs – Construction Being taken up
(5) Agra- 9Lacs, 13 LAcs, 18 Lacs, (21-25)Lacs
(6) Meerut- 8Lacs, 12Lacs, 14 Lacs, (16-20) Lacs
(7) Varanasi- 10Lacs, 12Lacs, 14 Lacs (16-18 Lacs)
(8) Allahabad- 8Lacs, 10Lacs, 12Lacs (14-15) Lacs
(9) Gorakhpur- 5Lacs, 6Lacs, 7 LAcs (8-9) Lacs
It would be wiser to wait for a few years before extending metro to more cities like Agra, Meerut, Varanasi