It is not that simple. "Too fast for road and weather" is a ex post facto determination. If there was a crash, you were going too fast.
Fog is tricky. Fog can give the driver a false sense of security. Modern overly-reflective road markers can, at night, make a driver think they are seeing further through fog than they are. They can see the lines, but can they see the black car parked ahead? Note too that large pile-ups in fog often involve trucks. Imho much of that is because truck trailers have poor running lights. We see the cars ahead. We follow their taillights through the fog. But that black truck flatbed trailer with two tiny red orbs is invisible. Or we think it is further away.
Fog also thickens unevenly. It blows around. Slamming on the brakes immediately upon entering a bank isn't going to make you any friends amongst the people behind you. That truck 4 seconds behind you (a reasonable distance on a highway at night) might not stop as quickly as your ferrari. Truck drivers are also much higher. They may have greater visibility than you and not realize that your sports car places your eyeballs in the low-level fog. The safest bet in traffic is generally not to act abruptly and unexpectedly.
(fyi, a sportbiker's helmeted head is also generally much higher than in cars, even SUVs. They too have better visibility in fog.)
And if you forget to turn on your car's taillights, all is lost. There is a reason that motorcycles have them hardwired on.
Fog is tricky. Fog can give the driver a false sense of security. Modern overly-reflective road markers can, at night, make a driver think they are seeing further through fog than they are. They can see the lines, but can they see the black car parked ahead? Note too that large pile-ups in fog often involve trucks. Imho much of that is because truck trailers have poor running lights. We see the cars ahead. We follow their taillights through the fog. But that black truck flatbed trailer with two tiny red orbs is invisible. Or we think it is further away.
Fog also thickens unevenly. It blows around. Slamming on the brakes immediately upon entering a bank isn't going to make you any friends amongst the people behind you. That truck 4 seconds behind you (a reasonable distance on a highway at night) might not stop as quickly as your ferrari. Truck drivers are also much higher. They may have greater visibility than you and not realize that your sports car places your eyeballs in the low-level fog. The safest bet in traffic is generally not to act abruptly and unexpectedly.
(fyi, a sportbiker's helmeted head is also generally much higher than in cars, even SUVs. They too have better visibility in fog.)
And if you forget to turn on your car's taillights, all is lost. There is a reason that motorcycles have them hardwired on.