I guess...the proximity of Nellore to Chennai and the proximity of Gudur to Nellore and trains getting a halt at Gudur.........is one of the reasons.Feels a bit strange though as with a population of 5,00,000+ Nellore is the 6th biggest city in A.P and i am sure it's proximity to Chennai makes people prefer working/studying in Chennai which leads to a lot of traveling.Krishnapatnam Port is bigger than Gangavaram and Kakinada ports put together in terms of size and almost equal in terms of operations and growing and the promoters hoping to make it one of the top ports on east coast and in the country.I am sure,one can't ignore Nellore for much long.The port would end up bringing more people into and around Nellore so all this bods well for Nellore.