All about light reflectants and saraphanes:
Read the original document, and don’t listen to the OSC radio (one grandmother said):

Decree of November 14, 2014 No. 1197
...
In order to increase the visibility of pedestrians in the dark hours of the day, it is established the requirement for pedestrians to use reflective elements when moving along the road outside of settlements in the specified period of time.
...
1) on the passing part
and
2) Outside of settlements
and
3) In the dark hours of the day

So speed limits do not play a role. And who is in such places at such a time in the Sarafans is also a separate topic.