This invention relates to construction machinery or a utility vehicle with at least one vehicle cabin or at least one driver's cab with a first seat with first control devices for a first operator, from which all of the essential driving and/or operating functions of the utility vehicle/construction machinery can be controlled. At least one second seat with second control devices for a second operator is provided in the vehicle cabin/the driver's cab in accordance with the invention, from which all of the essential driving and/or operating functions of the utility vehicle/construction machinery can likewise be controlled, including a steering function for the vehicle. Control elements are provided by means of which a higher standing is assigned to the second control devices when the first and second control devices are simultaneously actuated, so that the second control devices override the first control devices.