If you are traveling by car from from Austria and Hungary go via Zagreb to Split on the A1 motorway. If you are traveling from Italy you should go via Rijeka along the Rijeka-Zagreb motorway to Bosiljevo intersection, then on the A1 motorway to Split or Makarska. Car ferry to the island of Brač is available from port of Split and port of Makarska. For timetable and online ticket purchase visit www.jadrolinija.hr.
If you are arriving from Split you will reach city of Supetar on the island, and if you are arriving from Makarska you will reach Sumartin on the east coast of the island.
All important information about road and highway traveling (such as tolls, road conditions, maps, location of gas stations, etc.) can be found on the official website of the Croatian Auto Club: www.hak.hr