One of the men who drove a motorised picnic table down a highway in Scarborough on Sunday told Radio 6PR on Monday that the six-seaters could reach up to 50 kilometres an hour, but were still "pretty safe" and handled "like a go-cart".

Earlier in the day, footage of a group of Perth blokes casually drinking beer while driving two motorised picnic tables down the West Coast Highway went viral on social media.

Bewildered drivers and passers-by in the area filmed the men turning right at a set of lights before driving down a pathway.

But the driver, who also built the table, said he and his friends only crossed the busy highway to fill their tables up at the petrol station.