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Why does fog affect road transport?

Answer and explanation

Correct answer: It reduces visibility

Direct answer: B, it reduces visibility. Fog is made of very small water droplets suspended close to the ground. These droplets scatter and partly absorb light, so a driver cannot see as far or distinguish road markings, vehicles and obstacles clearly. Reduced visibility increases the time needed to notice a hazard and react safely. Fog may also be associated with damp road surfaces, but the direct reason asked here is the obstruction of vision. A is incorrect because fog does not change the physical length of a road. C is incorrect because suspended droplets do not reduce the mass of vehicles. D is incorrect because fog has no power to stop gravity. Drivers must reduce speed, maintain a safe distance and use suitable lights according to road-safety guidance. Memory cue: fog is near-ground cloud; its main transport hazard is poor visibility.

Related tags

GeographyFogVisibilityForms Of Condensation: DewFrostAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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