Reduced visibility means
a) such visibility, when a driver of a motor vehicle, due to dirt or damage of glasses does not see sufficiently clearly other participants of the road traffic,
b) visibility in time from 6:00 p.m. until 7:00 a.m. and from July 1 until August 31 only from 8:00 p.m. until 6:00 a.m.,
c) such visibility, at which participants of the road traffic do not see sufficiently clearly each other, also if they do not see items on the road, mainly from dusk till dawn, during fog,
when it is snowing, raining or in a tunnel.
