Question

angle of banking is independent of mass of the vehicle

Answer 1

When a vehicle moves along a horizontal unbanked curved  road, necessary 
centripetal force of force between wheel and surface of the road.

If a vehicle of mass 'm' is moving along a horizontal curved road of radius 'r'
with speed 'v' then,

Centripetal Force = mv²/r

Answer 2

Yes angle of banking is independent of mass but dependent on velocity of the body .