The invention provides a roll-over suppressing control apparatus for a
vehicle which can make a decision of a start of roll suppressing control
appropriately in response to the degree of the possibility of turning
over on its side of the vehicle. The roll-over suppressing control
apparatus includes a braking mechanism for braking wheels of the vehicle,
a roll rate sensor for detecting a roll rate of the vehicle, and a
roll-over suppressing control section for controlling the braking
mechanism so that, if the roll rate detected upon turning of the vehicle
becomes equal to or higher than a control starting threshold value, then
it is decided that the vehicle is in an excessively rolling state and
braking force is applied to the wheels. The control starting threshold
value is set to different values depending upon different types of
turning of the vehicle (depending upon whether the turning is sudden
steering back turning, moderate steering back turning or one-directional
turning).