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mk · 3114 days ago · link · · parent · post: MIT found a solution for AVs in snow and rain with Localizing Ground Penetrating Radar
There are a lot of approaches that can be taken with this system since the signature can be arbitrary. Actually having a unique fingerprint for each stretch of road would give you the option to navigate specific places differently without the need for active GPS. Surface markings could be turned into bar codes with the addition of metal strips. :)