Race is on for speedier rail travel

Bullet train upgrades in the works, CASIC studying maglev hyperloop

China's commercial bullet train will be able to go even faster if the vibration noise it generates is brought under control, a member of the Chinese Academy of Engineering said.

"China has tested a wheeled bullet train at speeds up to 420 km per hour in operation. ... The safety index is totally fine - including the derailment coefficient, shock absorption, vertical acceleration and horizontal acceleration - leaving the vibration noise (unsolved)," He Huawu said in a China Central Television program on Sunday night.