Well, newly built Tibetian railway line is really a great achievement being one of the world's highest train routes. But there was not any alternatives to reach TIBET and that was the most feasible route. And.." There is nothing impossible.... It is just matter of Interest, courage, devotion, sacrifice and contribution" It's also true. But what can I suggest you looking at the achyut's map, the cost of the proposed railway line will be more than half if you shift the route to 50 km south from the current one. Feasibility, cost are more important factors than Interest, courage, devotion, sacrifice and contribution when it comes about road and railway networks.