Vehicle Regulating System and Method for Determining Tire States

A control device for a vehicle regulating system is configured to pick up driving state measurement signals from driving state sensors of the vehicle and determine reaction properties of the vehicle wheels from the signals. The control device is configured to also pick up roadway measurement signals of a spectroscopic sensor that is aligned with a roadway surface and determine therefrom the presence and/or properties of a layer of water on the roadway surface. The control device determines tire properties of the tires on the basis of the determined reaction properties of the vehicle wheels and the roadway measurement signals.