Take the Firenze Impruneta exit on the A1 motorway, then take the dual carriageway to Siena (approach road immediately to the right after coming off the A1) and come off at San Casciano Val di Pesa (first exit on the dual carriageway, approximately 6 km), continue towards the town of San Casciano, follow the directions for Mercatale Val di Pesa.
Take the SP92 road / Via Grevigiana and follow the directions for Salvadonica.
If you're arriving by plane the nearest airports are in Florence and Pisa.
If coming from Pisa international airport, take the train to Florence central station Santa Maria Novella and from here take the SITA coach to Mercatale Val di Pesa.
If you're coming from Florence airport take the shuttle to the central station of Santa Maria Novella and from there take the SITA coach to Mercatale Val di Pesa.