Method and device for detecting the passage of a motor vehicle through a road sign gantry

A control-and-evaluation unit for detecting a passage of a motor vehicle through a road-sign gantry, the control-and-evaluation unit being configured to:

• receive environmental information pertaining to a road;
• recognize road signs in the environmental information;
• identify a correct direction of travel for the road;
• select a first road sign and a second road sign of the recognized road signs arranged on opposing sides of the road, the first road sign and the second road sign together constituting the road-sign gantry;
• ascertain position data for the first road sign and for the second road sign from the environmental information;
• determine a gantry width between the first road sign and the second road sign;
• determine a first distance of the motor vehicle from the first road sign;
• determine a second distance of the motor vehicle from the second road sign;
• and
• detect the passage of the motor vehicle through the road-sign gantry as a function of the gantry width, the first distance, and the second distance, the passage of the motor vehicle through the road-sign gantry indicating that the motor vehicle is traveling in a wrong direction on the road;
• and
• the control-and-evaluation unit being further configured to:
• check the gantry width for plausibility;
• and
• discard the road-sign gantry in response to the gantry width being implausible.

A non-transitory computer program product that, when executed by a control-and-evaluation unit, is configured to cause the control-and-evaluation unit to:

• receive environmental information pertaining to a road;
• recognize road signs in the environmental information;
• identify a correct direction of travel for the road;
• select a first road sign and a second road sign of the recognized road signs arranged on opposing sides of the road, the first road sign and the second road sign together constituting the road-sign gantry;
• ascertain position data for the first road sign and for the second road sign from the environmental information;
• determine a gantry width between the first road sign and the second road sign;
• determine a first distance of a motor vehicle from the first road sign;
• determine a second distance of the motor vehicle from the second road sign;
• and
• detect a passage of the motor vehicle through the road-sign gantry as a function of the gantry width, the first distance, and the second distance, the passage of the motor vehicle through the road-sign gantry indicating that the motor vehicle is traveling in a wrong direction on the road;
• and
• further configured to cause the control-and-evaluation unit to:
• check the gantry width for plausibility;
• and
• discard the road-sign gantry in response to the gantry width being implausible.