Why is it dangerous to drive during the first sign of rain?

Vince M

Not at the first sign of rain. Rain has to actually fall for the roads to become slick. What happens then is that all the oil and grime that settles on the road surface gets lifted by the rain, and floats above the water. This oily surface is what makes the roads especially slick as the water has not yet had the time to wash away the oil. After the second or third day, or after several hours of HARD rain, the material is washed to the shoulder and down the drains.

Matt R

normally it's because the roads will be slippery. Cars constantly put oil and debris onto a road, when it first starts to rain is when all this oil and debris will lift up and cause the road to be extra slippery only after a period of time has the rain washed everything away and in turn cleaned the road so to speak.

Rob

B...when it dosnt rain for a while the roads are dry but the first rain gets on the roads and it just sits there making the tracsion on the road less making your car slide

David R

After the dry summer months, oil and road grime builds up on the road. When the first rain comes it brings the slippery material to the surface. I am in the Auto Collision industry and the first rains brings in work for me. So please drive slower and check your tires and wipers.

Skaggmo

It's dangerous to drive at ANY time during rain. Just listen to a police scanner and you'll see, there are ten times more accidents when it rains, and the more it rains, the longer it rains, the harder it rains, the more accidents there are. Believe me, I am a former ambulance chaser, I know.

osh301

because of the dirt and oil on the road will become slippery. Usually this only last during the first 30 minutes.

wyoknott52

I know this from experience. When rain first starts, the accumulated oil and dust on the road combines with the rain water to create a super slick mixture that can be as slick as ice. After a few hours of steady rain most of this has washed away and the roads are only as slick as wet roads.

Dan W

B and D;
B Water tends to release amd raise oil from the pavement and doesn't have time to wash it off;
D Everyone else is sloshing thru B and if it hasn't rained lately they forget to use extra distance and time.

emschick638

the roads are more slipperry, because the oil that has fallen over the last several dry days is now wet... oil and water don't mix....

Sahara

b. the roads tend to be most slippery

You can try an experiment at home to see how it works. Just work with different materials but same principle.

The water does not get absorbed into the road immediately. It's slicker at first.

edit: I did not think about the oil and debris from cars, etc. That makes perfect sense. Oil and water do not mix as we know.

poke_kee

If it is hot the oil in the asphalt comes to the top if is is cool the oil on top of the asphalt is washed together by rain either way the oil makes it slick

Friendly Stranger..

The answer is B. The reason is because when you first drive at the sign of rain, the roads become slippery because oil is produced. The oil is already there but when it rains, the oil surfaces which causes a loss of traction. That is why whenever you drive when it first starts raining, sometimes when you pull off after being stopped the tires will lose traction causing the feeling that your car is sliding. It has to do with the oil being produced when it starts to rain.

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