Reduced visibility means
a) such visibility, at which a driver of a motor vehicle, due to pollution or damage of glasses, does not adequately see other participants of the road traffic.
b) such visibility, at which participants of the road traffic adequately do not see each other, or they do not see objects on the road, especially from dusk to dawn, at fog, snowing, rain and in the tunnel,
c) visibility between 6 p.m. until 7 a.m. and from 1 July until 31 August only from 8:00 p.m. until 6:00 a.m.
