Local train also known as EMU is the cheap and fastest connectivity option for passengers from NCR.
these trains connect Delhi with gaziabad, faridabad, sonipat, merrut, palwal, ballabgarh... and many more

Fare is very cheap, the only problem is that these are mostly jam packed, running late, no security in night for women...
but popular option for traveling...

for route, train and fare enquiry please visit indiarail.info