There is no such thing on the speed limit law as the word "reasonable" at least here in GA and I doubt elsewhere. You can get a ticket for going to fast. Going to fast for conditions, driving while impaired, etc. but not for bieng "unreasonable". Gees where did you latch on to this word which is supposed to trump the law. We don't use the word "unreasonable" if you are dring the speed limit in a down pour or in fog.
The word my friend for the final time is "too fast for conditions" comprende. I hope you can understand that. This law as far as I know in on the books in all the states and countries around the world and they do not use the word you love to use "unreasonable" get off it and get a life. It might be resonable to drive 60 mph in a 4 lane divided highway but the speed limit is 45 but that won't get you out of a ticket. Like I said and say again for the hard to understand. The word here is too fast for conditions. Gees. Thank you, thank you very much