Hi Phil , my wife and I arrive in Antalya on the 3rd Jan at 21.00 hrs and have driven this Road many times, but as everyone has said this trip is wonderful and has fantastic views during the Daylight hours, it is in general a good road with a lot of dual carriageway on it's route, Once you finally get out of Antalya it's very easy and is signposted well. I am led to believe that Snow Chains are mandatory and could carry a fine from the local Police if you fail to have them , worth contacting your Carhire Company and adding this to your contract.. it's quite common. We are seriously considering booking into a Hotel in Antalya , then make a fresh start early morning , there is a huge choice of hotels and they are very cheap . Basically , it's just your luck , the weather could be in your favour.