The city of Chicago will inject $50 million into the ravaged parking meter fund that once totaled $1.15 billion to help fund the government over the length of the 75-year parking meter lease. Less than three years into the deal, with the $50 million included, the balance in the account will be $125 million at the end of this year. The extra money has become available because different state-sourced revenues have come in at a better clip than previously expected.