When estimating how long a drive will take, figure you'll average 100 kilometers per hour on expressways (about the same as going 60 mph back home). Determining how much ground you can cover off the freeway is a crapshoot. I use a trick an Irish bus driver taught me: Figure a minute for every kilometer (covering 90 km will take you about an hour and a half). Double that for slow, curvy roads, such as in Italy's Dolomites or along its Amalfi Coast.