Biggest traffic jam you've seen?
If you don't like sitting in big traffic jams, then give a thought to the drivers and passengers in this huge jam.
It happened just outside of Beijing, the capital city of China, as people were returning home from a national holiday.
There are more than 30 lanes of vehicles, which then merge into fewer lanes - it can't have been fun being stuck in any one of them!
Watch the clip to see the gigantic traffic jam...