The 53km-long Jammu-Udhampur rail line is already operational and the Udhampur-Katra line, which is a part of the Kashmir rail link project, is made operational, the trains will be able to come up to Katra directly.
That would enable pilgrims headed to the Vaishno Devi shrine to travel directly to the base camp at Katra.
Addressing a public rally in Katra after flag off ceremony, PM Narendra Modi said: "Jammu and Kashmir has passed through very trying times. It is the desire of every Indian to ensure that the state makes progress and the youth here get employment.
"It is our duty, and we will do it, whether we are in power in the state or not.
"I want to give a message to the people of Jammu and Kashmir that the journey started by Atal Bihari Vajpayee in the state will be taken to its logical conclusion."
The prime minister, who arrived earlier in Jammu, said the Katra-Udhampur rail link had been inaugurated at a time when the Amarnath Yatra was on and also during the holy month of Ramadan.
"The rail link is dedicated not only to the people of Jammu and Kashmir but also to the people of the country who come here in millions to pay obeisance at the Mata's shrine.
"When progress takes place at one place, some people at other places feel neglected ... as the chief minister has said about the apprehensions of the people of Jammu city.
"I want to assure the people of Jammu that their interests will be protected. I do not believe anybody will come to Katra and not visit Jammu city.
"Building of infrastructure is a holistic exercise. Whenever development takes place at one place, its benefits reach all places."
