I'm Polish so I'll speak about here.
Before the Iron curtain fell cars were seen as a symbol of prosperity, at the same time the roads were empty, so having a car was also massively more convenient. Then the PRL ended and suddenly everyone was able to buy a car. So everyone did. People stopped using the busses and trains, so they received less and less funding, leading to reduction in service frequency and available routes, leading to more people buying cars.
I'm Polish so I'll speak about here.
Before the Iron curtain fell cars were seen as a symbol of prosperity, at the same time the roads were empty, so having a car was also massively more convenient. Then the PRL ended and suddenly everyone was able to buy a car. So everyone did. People stopped using the busses and trains, so they received less and less funding, leading to reduction in service frequency and available routes, leading to more people buying cars.