The delays on the M1 southbound near J18 doubled at around 1pm, according to National Highways East Midlands' X account.
The account was previously warning of 60-minute delays but that has now increased to 120.
On its website, the National Highways is recommanding motorists to allow extra journey time.
"Plan ahead, you may wish to re-route or even delay your journey," it says on its website.
