A crane vehicle capable of preventing another vehicle from coming into contact with a tip end portion of a boom when entering an intersection includes a controller that detects an obstacle on a lateral side of a tip end portion of a boom by using left and right cameras when the vehicle enters an intersection or the like. When it is determined that a detected obstacle may come into contact with the tip end portion of the boom, the controller drives a brake device to stop a crane vehicle, and causes a speaker to output a warning sound. When it is determined that there is no risk of contact with the boom as the detected obstacle stops, or moves away from the crane vehicle by turning left or right, or passing an intersection, the controller releases the driving of the brake device to enable travelling of the crane vehicle.

A platform twist mitigation apparatus operable to extend jacks into engagement with a surface disposed below a platform carrying the jacks, and to alternately extend and retract the jacks to change platform attitude relative to the surface. Tilt sensors are supported at spaced locations on the platform. An electronic control module is programmed to detect a platform twist condition in response to angle data received from the tilt sensors and to mitigate the platform twist condition by operating or modifying the operation of the jacks.

A platform twist mitigation apparatus operable to extend jacks into engagement with a surface disposed below a platform carrying the jacks, and to alternately extend and retract the jacks to change platform attitude relative to the surface. Tilt sensors are supported at spaced locations on the platform. An electronic control module is programmed to detect a platform twist condition in response to angle data received from the tilt sensors and to mitigate the platform twist condition by operating or modifying the operation of the jacks.