Comment by ijk
7 hours ago
That's not necessarily a downside for traffic safety, though. Though I imagine someone must have studied the effects of various wavelengths on drivers...
7 hours ago
That's not necessarily a downside for traffic safety, though. Though I imagine someone must have studied the effects of various wavelengths on drivers...
Advertisers definitely did - there's (some) money in billboards, but only as long as you don't kill your prospective customers.