I feel single line beyond Haridwar is okay as there is lack of space and as Doon is a terminating station with still not such long platforms, I feel single line is doing well..no need to add one more line. There is no rush of goods train here then trains can easily made cross at Harrawala Doiwala Raiwala etc so why to invest crores of money that's not going to give returns second why to disturb our wild life. Rail Electrification work is also against forest basic rules after Haridwar IR could have used WDP4D locos to fetch trains with e locos to Doon but then that's another issue.