Vehicle guidance system and method for operating a driving function when there is a contradiction with map data

摘要

A vehicle guidance system for providing a driving function for automated longitudinal guidance of a vehicle is described. The vehicle guidance system is set up to detect a first signaling unit on the basis of environmental data, which is located on a roadway traveled by the vehicle in front of the vehicle in the direction of travel. The vehicle guidance system is also set up to determine that there is a contradiction between the first signaling unit detected on the basis of the surroundings data and map data with regard to a road network on which the vehicle is driving. In addition, the vehicle guidance system is set up, in response to this, to cause an unavailability output to inform a user of the vehicle that the first signaling unit detected on the basis of the environmental data is not taken into account in the driving function for automated longitudinal guidance of the vehicle.