3 ms·
Retroreflectors are good but at a long distance you need a significantly brighter light source/reflection to be visible (intensity falling off with distance squ
by user_7832 3y ago
Retroreflectors are good but at a long distance you need a significantly brighter light source/reflection to be visible (intensity falling off with distance squared). At highway speeds that distance for safe stopping is probably in the hundred+ feet range.
- modeless 3y agoIt seems like in this case the retroreflectors may have worked. The problem is the car that saw and avoided them blocked the BlueCruise car from seeing them until it was too late.