The tailshaft of a truck has caused chaos on the Monash.
"Probably a kilometre inbound prior to Warrigal Road, probably a dozen cars pulled over on the side of the road all with punctured tyres," caller Matt told the Hot Breakfast.
Both the left and right hand emergency lanes are reportedly affected.
PHOTO: statement from VicRoads
"It's from Huntingdale Road onwards," said caller Rick. "There's even a couple of cars past Warrigal Road that had flat tyres."
"I've never seen so many cars pulled over with punctures."
Earlier callers suggested tacks were responsible, however police have since confirmed the debris came from a truck.