|The route will pass through remote areas of high intensity|
earthquakes, low temperature and atmospheric pressure.
Approximately 780 km (485 mi) of the line will be laid at
an elevation of 4,500-5,000 m (14,765-16,405 ft), with the
highest point reaching 5,072 m (16,641 ft) at the Dangla
(Ch: Tanggula) Mountain pass. At elevations in excess
of 4,000 m (13,124 ft), the low oxygen content causes
high failure rates of combustion engines and machinery,
high/low tension electric equipment, and can have serious
effects on human health.