Section 151 in The Bihar Motor Vehicles Rules, 1992
151. Stability.
(1)The stability of a double decked public service vehicle shall be such that when loaded with weights of 50 kilograms per person placed in the correct relative position, to represent the driver and conductor (if carried), and a full complement of passengers on the upper deck only, if the surface on which the vehicle rests were tilted to either side to an angle of 28 degrees from the horizontal, the point at which over turning occurs would not be reached.(2)The stability of a single-decked public service vehicle other than a motor cab and maxi cab: shall be such that under any conditions of load at an allowance of 68 kilograms per passenger and his personal luggage, for which the vehicle is registered, if the surface on which the vehicle rests was tilted to either side to an angle of 35 degrees from the horizontal, the point at which over turning occurs would be reached.(3)For the purpose of conducting the test of stability the height of any stop used to prevent a wheel of the vehicle from slipping sideways, shall not be greater than two-third of the distance between the surface upon which the vehicle rests before it is tilted and that part of the rim of that wheel which is then nearest to such surface when the vehicle is loaded in accordance with the requirement of this rule.
