Of the 600,000 cyclists who take to Perth roads each week, nearly half are afraid to share the road with motorists, according to a survey released by the RAC.

The statistics follow a damning report released by the Office of the Auditor General in October which found Perth's cycle infrastructure was incomplete, lacked connectivity and had undesirable safety levels.

Cyclist Credit:Sam Bennett

The 2015 annual RAC survey, released during Bike Week, found 43 per cent of Perth cyclists were deterred from riding out of fear of being mowed down by a motorist.

Around 87 per cent of cyclists surveyed also claimed they were forced to ride on roads because there was no alternative path - only 36 per cent felt safe to do so.