A Ford Fiesta was pulled over after it was spotted speeding in the Rossendale area on Friday night (March 4).
It was discovered the motorist – who “smelt strongly of cannabis” – was a Domino's driver who had finished their shift.
He was drug tested at the side of the road which returned a positive result, police said.
He was arrested at the scene.
A spokeswoman for Domino’s said: “The safety of the public and our colleagues is our main priority when our drivers are out delivering pizzas.
“All our delivery drivers complete comprehensive safe driving training when they join our business, and on the rare occasion we see an incident like this we address it immediately with the store and driver involved.
“The issue is currently being investigated internally with the store team, and we will of course support the police with any enquiries they have."
