New York City's controversial congestion pricing plan begins today. Here's what you need to know about how it works, who it affects and what it will cost.

“We are disappointed that the courts are allowing congestion pricing to take effect,” Natalie Hamilton, a spokesperson for New Jersey Governor Phil Murphy, said in an emailed statement after the US Court of Appeals for the Third Circuit denied the state’s appeal. “We will continue fighting against this unfair and unpopular scheme.”