how about these: https://upload.wikimedia.org/wikipedia/commons/b/b2/Leitpfosten_mit_Wildwarnreflektor-2.JPG https://upload.wikimedia.org/wikipedia/commons/b/b2

how about these: https://upload.wikimedia.org/wikipedia/commons/b/b2/Leitpfosten_mit_Wildwarnreflektor-2.JPG https://upload.wikimedia.org/wikipedia/commons/b/b2/Leitpfos... also road paint is mixed with glass fragments and is highly reflective. ok, it does not glow at night by itself, but your car should have lights ;)