Yes, public transport will be free within the regions and Host Cities. It will be valid for 36 hours, i.e.: from 6 am on match-day until 6 pm of the day after.
Match ticket holders who wish to travel within Germany can purchase discounted national long-distance tickets for their round trip via Deutsche Bahn. For match ticket holders travelling from outside of Germany, a discounted Interrail pass will be available.
You will find more information in the section “Ticket holder benefits” of our Event Guide.