No, 0.5 cars per unit, meaning they expected only a half of families living in these blocks to own a personal vehicle. It made sense back then when the eastern bloc industry was so powerful, people had to wait for years to even be allowed to buy a Skoda 120 (Skoda Estelle in the UK, maybe you've heard of it). And I don't mean that buying one was restricted based on party status or something, it's just that the economy was so fucked, the industry was incapable of supplying enough cars, even when demand was limited because pretty much anyone had to spend their fucking life savings to buy one shit-tier car that was universally laughed at in the west, so there were waiting lists that were years long.