A MAN was spotted napping in his car on a busy motorway. 

Dumbarton cops came across a vehicle stopped on the hard shoulder of the M8 this morning. 

The driver, aged 25, was sleeping and was later asked to provide a specimen of breath.

He allegedly failed the breath test and was arrested. 

Road Policing Scotland said on Twitter: "#DumbartonRP came across a vehicle stopped on the hard shoulder of the #M8 this morning.

"The 25-year-old male driver was having a wee nap. This raised suspicions and the driver was subjected to a breath test, which he failed.

"Arrested and awaiting results. #TL23B #KnowYourLimits