In a double articulated vehicle, such as for use in low clearance areas, i.e. mines with low ceilings and the like, front and rear frames are pivotally mounted relative to an intermediate carriage about spaced vertical axes. A link is pivotally mounted to the front and rear frames with the longitudinal axis of the link crossing the centerline of the vehicle. Rams are provided between the carriage and the front and rear frames so that actuation of the rams turns the front and rear frames simultaneously relative to the carriage.