Follow directions for the motorway Florence-Pisa-Livorno (FI-PI-LI) and continue until the exit for Ginestra Fiorentina. At the roundabout take the second exit for the country road 12 (SP12). At the next roundabout take the first exit for the country road 80 (SP80), turn and continue along the SP4. First follow directions for Tavernelle, then for Barberino Val d'Elsa. Finally follow directions for Petrognano.