Abstract:
As a train (or other vehicle) rounds a curve at speed, objects inside the train experience centrifugal force. This can cause packages to slide about or seated passengers to feel squashed by the outboard armrest due to its centripetal force, and standing passengers to lose their balance. Tilting trains are designed to counteract this discomfort. tilting train is a train that has a mechanism enabling increased speed on regular rail tracks. In Tilting Train a curve to the left the train tilts to the left to compensate for the g-force push to the right, and vice versa. The train may be constructed such that inertial forces cause the tilting (passive tilt), or it may have a computer-controlled power mechanism,The train has flexible steering that allows the wheels to hug the rail and permits it to drive around turns faster than most other trains, tilts as it winds its way around the curves. The tilting compensates for the centrifugal force on passengers at high speeds. The X2000 is one of several train systems under consideration by railroads in the United States

read
http://allbusinessprofessional-scientific/scientific-research-development/354514-1.html
http://krri.re.kr/krri_2008/department/r...ilting.pdf
http://en.wikipediawiki/Tilting_train