Method, apparatus, and system for traffic sign learning

An apparatus for road sign learning comprising:

• at least one processor;
• and
• at least one memory including computer program code for one or more programs,
• the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following,
• select road sign data from either learned road sign data or alternate road sign data based on one or more rules, wherein the learned road sign data is determined based on clustering, according to a determination that a number of a plurality of road sign observations satisfies a pre-determined threshold, the plurality of road sign observations according to location data and sign property data generated using sensor data collected from a plurality of vehicles;
• and
• provide the selected road sign data for presenting a mapping user interface on a device, operating an autonomous vehicle, or a combination thereof.

A non-transitory computer-readable storage medium for traffic sign learning, carrying one or more sequences of one or more instructions which, when executed by one or more processors, cause an apparatus to perform:

• clustering, according to a determination that a number of a plurality of traffic sign observations satisfies a pre-determined threshold, the plurality of traffic sign observations into one or more clusters, wherein the plurality of traffic sign observations relate to at least one traffic speed sign detected from sensor data of a plurality of vehicles, and wherein the plurality of traffic sign observations includes data indicating a sign speed value, a sign type, a location of a reporting vehicle when a respective traffic sign observation is made, a side of a road on which the respective traffic sign observation is made, a time stamp, or a combination thereof;
• determining a learned sign speed value based on the one or more sign clusters;
• and
• updating a speed attribute of a road link record of a geographic database based on the learned sign value.