Hundreds of cyclists in Sydney participated in the annual Ride to Work Day event with riders taking the opportunity to enjoy a free breakfast and other activities.
And overcast day in the Harbour City was more than matched in Melbourne, with commuters there braving the rain on their way to work.
In Sydney the Lord Mayor Clover Moore was joined by cycling commuters and City of Sydney Cycling Ambassadors Ian Roberts and Nell Schofield at a free breakfast in Hyde Park South to mark the event.
Ms Moore also used to occasion to launch the opening of the bridge to bridge cycleway route.
The 2.6 kilometre route connects the city's two iconic bridges, The Sydney Harbour Bridge and the Anzac Bridge, and is designed separates bikes from traffic as much as possible.
"Connectivity is the key to supporting safe, convenient cycling. The community told us they wanted a good bike network and I'm excited to declare the first part of it open.
"Already, well over 1100 riders are using the Union Street route in the morning and evening travel times, and these numbers will only grow," Ms Moore said.
A cycleway on the southern section of College Street will also open this week, which will eventually link to King Street as a safe and convenient route to the city from the east as well as connecting with the Bridge to Bridge route.
Ms Moore said: "Bike riding is a smart and sustainable transport option for short inner city trips, which is why the numbers of bike riders in Sydney is increasing rapidly."
Sydney communities consulted for Sustainable Sydney 2030 said they wanted safe cycling routes that could be used to get into and around the city.
Since then, further independent research, carried out in June indentified that 84 per-cent of Sydney residents regard a bike network as important.