The Qinghai-Tibet Railway, the highest rail in the world, was hailed as a miracle of engineeringwhen it began running a year ago. Today, it isbeing hailed for the economic benefits it hasbrought to the once isolated region of Tibet The Qinghai-Tibet Railway, the highest rail in the world, was hailed as a miracle of engineeringwhen it began running a year ago. Today, it isbeing hailed for the economic benefits it hasbrought to the once isolated region of Tibet