LHB coaches is safe compared to icf coaches in case of an accident i agree. but.......
"Senior citizens ,Heart patients etc can be travelled to Chennai with less vibration" - ------ what about all these many years? didn't icf coaches carry them safely, did anyone suffer illness or heart attack from "vibrations" of icf coaches?
lhb coaches give jerks. isn't icf coaches better in that case as per your logic.