Freiburg, Germany implemented a 5 pillar plan in the 1970s to address major traffic problems: 1) Traffic calming through pedestrian zones and low speed limits 2) Concentrating traffic on key roads to divert it from scenic areas 3) Limiting parking and encouraging public transport use through fees 4) Expanding public transport like trams and travel passes 5) Promoting bicycles through over 500km of bike lanes and parking This led to fewer car commuters, less city center traffic, and 70% of trips using public transport.