Fog reduces visibility to about 50 metres. Which hazard category does that fall into, and what follows? · Q-0287

Fog reduces visibility to about 50 metres. Which hazard category does that fall into, and what follows?

1. a A vision block — slow to a speed at which you can stop within what you can see
2. b A poor road condition — fit winter tires
3. c A surprise — expect the unexpected
4. d A space conflict — increase following distance only

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