Why even enforce these businesses to have parking minimums when this happens anyway. That said i do think it should be illegal to have a drive thru overflow into the street. If you set up a private drive thru lemonade stand in your driveway and caused traffic jams in your neighborhood the city would defintely get involved even on a low traffic street, why is it acceptable for a fast food joint to do it on major roads? They could block emergncy vehicles, restrict visibility and in some cases I’ve seen them gridlock intersctions (which is already illegal in many places).