We have wait listed tickets of DDN Shatabdi train, which remained wait listed and we had to go by bus. We reached ISBT Kashmiri Gate and board a Bus for Haridwar.
Since it was an ordinary express bus, which ran on the highway only and stopped at the midway hotel on UP - UK border. The overall experience of travel by non-AC bus was okay. It was tiring and hot but we could pass 5-6 hours without any major difficulty.
If you are travelling by this kind of buses, please keep extra water bottles and some things to eat also. The Dhabas, where buses stop, charges high and quality of the items were usually not good. They also don't have proper toilet facility.