Backing up refers to a driver slowing down so the cars behind him get held up or begin to bunch up.

You may hear reference to this during a qualifying session where a driver is looking for a clear track ahead, or when the cars come to the start grid and a driver down the grid is happy for the cars at the front to lose tyre heat by waiting, or in a race where a driver may hinder the car behind to allow his teammate to get further ahead.

There are rules that control most of these scenarios, but the drivers and teams know exactly where the limits are and will use the rules to maximise their advantage. 

Andrew Burden

The author Kiwi F1 Fan