Drivers and motorbike riders in Victoria will have to leave at least a one-metre buffer when overtaking cyclists, and 1½ metres when travelling on a road with a speed limit of more than 60 km/h, under a new bill to be put to State Parliament on Wednesday.

The bill, to be tabled by the Greens, would see Victoria follow Queensland, which is already trialling minimum safe passing distance laws for cyclists, and South Australia and the ACT, which are set to do so.

Under current road rules, drivers must leave a "sufficient distance" when overtaking somebody on a bike or risk 10 penalty units and a fine of almost $1500. But the rules provide no specific guidance on what a safe passing distance is.

Greens MLC Samantha Dunn, who will introduce the bill, said cyclist numbers were growing and a one-metre minimum passing distance would provide clarity to drivers and afford cyclists better protection on the road.

"We're starting to see out of other states that it makes a real difference to cyclist safety," Ms Dunn said. "There is a huge community of cyclists in Victoria and they should have similar protections behind them as cyclists in other states have."