The 9-Euro-Ticket was a historic, one-time experimental transportation initiative introduced by the German government for three months in the summer of 2022. For just €9 per month, travelers were granted unlimited use of all regional and local public transport across the entire country, including buses, trams, U-Bahns, S-Bahns, and regional trains (RB and RE). It was designed to provide financial relief during an energy crisis and to encourage a shift toward sustainable travel. While the specific 9-Euro-Ticket ended in August 2022, its massive success led to the permanent implementation of the Deutschlandticket (D-Ticket) in 2023. As of 2026, the D-Ticket is the modern successor, offering similar nationwide unlimited travel on local and regional transport for a monthly subscription price (currently around €49 to €58 depending on recent price adjustments). Unlike the original 9-Euro-Ticket, the D-Ticket is a subscription that must be canceled by the 10th of the month, but it remains the most economical way for tourists and locals alike to explore Germany without worrying about complex regional fare zones.