Another point in here, don't ride these on the weekend if you have a choice. We went to Transalpina yesterday and the traffic was rediculous. People EVERYWHERE, parked up on the sides of the road. Drivers just stopping in the middle of the road. As said careful on Transalpina as the tarmac is new and thick and drops off a good foot on every side, so if you overcook the corner you are coming off and it wont be pretty.
We have opted to wait until Monday to do the Transfagarasan rather than do it today.