For someone who is quite familiar with the Dolomite roads, I see 2 alternatives:
1. Down thru Falzarego Pass on Rt 48/203 then across to Rt 251 to Colle St. Lucia down through Zold Alto and Forno di Zoldo, to pick up Rt. 51 at Longarone, and then on to the Tollroad A-27
2. Across Rt. 48 east to Cortina, down 51 through S. Vito di Cadore, thru Valle di Cadore and Castellavazzo to Longarone and on to A-27.
Both have about same milage with a bit more time going thru Cortina in No. 2.
I'm interested in opinions as to recomended way--balancing ease of driving, traffic, scenery, etc.