Uber threw a party for its drivers in Chicago on Monday that drew many more people than the ride-hailing company likely anticipated.

The event at Chicago's Museum of Science and Industry was billed as a driver-appreciation party, where Uber drivers were each allowed to bring three guests.

But so many people showed up that it caused a traffic gridlock in a section of Hyde Park, according to a report from The Chicago Tribune.

"That many people going to one place is just dangerous," local resident John Morrison told The Chicago Tribune, recalling that he saw vehicles, including a bus, driving on the wrong side of the road just to bypass the traffic.

Visit Business Insider's homepage for more stories.

An Uber driver-appreciation party on Monday evening drew so many people to Chicago's Museum of Science and Industry, it caused traffic gridlock in a portion of Hyde Park.

The text above is a summary, you can read full article here.