Ice, snow, wet road surfaces and roadworks — which risk factor do they belong to?

The road and its surroundings represent the scenario in which traffic takes place, and the demands to which the driver-vehicle combination must respond with the sum of its capabilities. The response capabilities must always exceed the demands presented by the road and its surroundings; if they do not, the demands will exceed the capabilities and an accident will occur.
The road and environment factor encompasses everything related to grip, bends, skidding and weather conditions (wind, ice, snow, etc.).