Navigation through unfamiliar spaces is a familiar challenge, and we have all sorts of standards and devices to support wayfinding in an urban environment. From
The Atlantic Cities, this way-cool manhole cover from Seoul, South Korea:
How cool would that be, riding through an unfamiliar city and the manhole covers are embedded navigation?
Except that, as a cyclist in rainy London, I've come to regard manhole covers as miniature anti-personnel mines, waiting to send the bike flying if crossed the wrong way...
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