Police were called this night after a dog got loose on the A1(M).
The event took place at around 5.45pm on the northbound carriageway simply south of the Scotch Corner junction.
The dog might be seen running south along the difficult shoulder with a man pursuing the animal.
Several police car were on the scene.
Witness Phoebe Willis said: “It was running rather quick.
“It was a black dog. It looked like a cockerpoo or maybe a poodle.”