calculating, offline by the mapping system, one or more mapping variables for a location on a roadway using digital map data stored in a geographic database, the one or more mapping variables including a ramp identifier, a link identifier, a position, a start offset, an end offset, a link length, a main link speed, and a main link map speed of a downstream connecting link;

receiving, in real-time by the mapping system subsequent to calculating the one or more mapping variables, a request for sensor data processing of a traffic sign near the location from a vehicle, the request including one or more sensor variables comprising a value for the traffic sign, which side of the roadway the traffic sign is on, a heading of the traffic sign measured as a clock-wise degree between the traffic sign and due north, a map matched link associated with the request, a latitude value for the traffic sign, and a longitude value for the traffic sign;

calculating, in real-time by the mapping system, one or more variables for the location using the one or more sensor variables and the one or more mapping variables, the one or more variables comprising a distance, a side of the roadway, pedestrian access, a heading, and a value for the traffic sign;

inputting, in real-time by the mapping system, the one or more variables into a model configured to output a classification for the traffic sign near the location;

providing, in real-time by the mapping system, the classification in response to the request; and

performing, by the vehicle, an action in response to the classification, wherein the action comprises decreasing a speed of the vehicle.