The above chart shows the huge increase in public transport ( trams) achieved in Freiburg, and the corresponding drop in car traffic.

Source of the above –

The above slides are taken from a paper given at the Bath Trams conference ( see below). 

slides 18 – 30 in and show how far better Freiburg is with trams  compared to York with buses, similar size cities.

Bath Tram conference papers 24th November 2018, Bath, WSC