When you are driving in bad weather or bad road
conditions, you should
Follow a little bit closer to the vehicle in front of
you than you normally would.
8
Use one and a half times the following distance
that you use in good conditions.
Use two times the following distance that you
use in good conditions.

When you are driving in bad weather or under bad road  conditions, you should: D. Use two times the following distance that you  use in good conditions.

Bad weather is most likely to affect the vision of a driver and as such it is expected that drivers adhere to safety rules and regulations established by the road safety agency, so as to prevent car accidents and collisions on roads.

On a related note, bad road  conditions can lead to car accidents and collisions on roads.

Hence, drivers should ensure they maintain a safe speed and distance between their vehicle and the one in front of them.

In conclusion, it is advisable for drivers to maintain two times (twice) the following distance that they  use under good weather and in good road conditions.

Read more on traffic rule here: link

When you are driving in bad weather or bad road  conditions, you should

Use two times the following distance that you  use in good conditions.

Explanation:

Experts suggest that when you are driving a car in rain,snow or sleet you should double the "Cushion" between you and the car in front of you mainly because in such bad weather conditions the brake reduces significantly.

the clapeyron equation (also called the clausius-clapeyron equation) relates the slope of a reaction line on a phase diagram to fundamental thermodynamic properties.

explanation: