You actually can: not the infra of course, but the operating organization.
In Melbourne, Australia, the state-run Public Transport Corporation was an MTA-style mess and the trains in particular were notorious for delays. In 2009, the operating contract was handed over to the company behind the Hong Kong Metro, and punctuality has ratcheted up from the low 80s to the mid-90s; not quite HK-style 99%, but still a marked improvement, all on the same crusty old infra.
