Method for checking the plausibility of at least one portion of a driving trajectory for a vehicle

A driver assistance system, comprising:

• A processor;
• and
• a storage device storing program code that, when executed by the processor, causes the driver assistance system to:
• provide at least one portion of a driving trajectory and at least one first marking portion of a lane marking, roadway marking, and/or roadway boundary marking based on swarm data stored by a storage unit;
• sense at least one segment of a roadway boundary for a roadway of a vehicle by way of a sensing unit of the vehicle in operating the vehicle;
• compare the at least one portion of the driving trajectory to the at least one segment of the roadway boundary based on a first plausibility condition;
• compare the at least one first marking portion to the at least one segment of the roadway boundary based on a second plausibility condition;
• check the at least one portion for plausibility based on a result of comparing the first plausibility condition to the at least one segment of the roadway boundary and a result of comparing the second plausibility condition to the at least one segment of the roadway boundary;
• for the first plausibility condition, examine if a side distance of the at least one portion of the driving trajectory to the at least one segment of the roadway boundary is within a width interval, wherein checking of the at least one portion for plausibility is based on examining if the side distance of the at least one portion of the driving trajectory to the at least one segment of the roadway boundary is within the width interval, comparing the at least one portion of the driving trajectory to the at least one segment of the roadway boundary based on the first plausibility condition, and comparing the at least one first marking portion to the at least one segment of the roadway boundary based on the second plausibility condition;
• sense a number of portions checked for plausibility, wherein the portions checked for plausibility constitute a contiguous sequence;
• compare the number of portions checked for plausibility to a minimum value;
• determine that the number of portions checked for plausibility is less than the minimum value
• generate an indication signal indicating that the driver assistance system is deactivated;
• and
• output the indication signal indicating that the driver assistance system is deactivated, wherein the indication signal is output optically, haptically, or acoustically.