The present invention relates to a method, a device, and a computer program for a first vehicle. The method comprises a step of obtaining information on a state of a roadway from a second vehicle or from traffic infrastructure. The method additionally comprises a step of validating the information on the state of the roadway based on a sensor signal or a step of obtaining information on a validation of the information on the state of the roadway from one or more third vehicles. The method additionally comprises a step of determining a trustworthiness of the information on the state of the roadway based on the validation of the information on the state of the roadway and/or based on the information obtained from the one or more third vehicles on the validation of the information on the state of the roadway.