The ‘one-metre rule’ would require road users to give cyclists one metre of room when passing at 60km/h or slower and 1.5 metres when travelling faster than 60km/h.
The rule was introduced in South Australia on October 25 last year.
Queensland has been trialling the rule for two years and on April 7 announced it would stay.
Premier Colin Barnett said earlier this month he was open to the one-metre rule being introduced in WA.
A Gosnells cyclist died last month after being hit by a car at an intersection.
In WA, two-thirds of cyclist deaths and injuries are right-angle crashes at intersections.
Mr Tallentire, who last year cycled around 8000km, said he was very supportive of the rule.
“I think we have got to have it. Most motorists do the right thing, but we need to set some sort of road traffic code or framework,” he said.
The Road Safety Commission said it was examining the proposal.