I looked up the history of roundabouts and it sounds like they were invented after the Town Planners, George and William Chaffey created the layout of Mildura. There are certainly lots of roundabouts there now and this is probably a side effect of the way the town was designed back in the 1800s. The newest roundabout in Mildura was a few blocks away from where we were staying and we used it on our way back to the unit on one day. We went exploring the back streets of Mildura, trying to figure out whether the street would continue on to our accommodation.
You may have noticed a theme in the names of the streets JessicaTam and I have been mentioning in our posts on Mildura. The town of Mildura was based on an extensive grid with many of the cross streets having numbers in their name, Seventh, Eighth, Ninth, Tenth etc, similar to many American cities. Most of them are very long streets. Many of the other streets have American sounding names. In the roundabout pictured above you can see a reference to Ontario Avenue.
Google Maps
This was named after the city of Ontario in California which was designed by George and William Chaffey, engineers from Canada (yes they were born in the province of Ontario, Canada). They used the same basic design when they designed their new irrigation colony of Mildura. Ontario, like Mildura was famous for it's citrus crops, thanks to the irrigation techniques used.
The bridge connecting Mildura to New South Wales is named The George Chaffey bridge and there are lots of other streets and landmarks named after the Chaffey brothers.
The main street of Mildura is Deakin Avenue. This was named after Alfred Deakin, the second Prime Minister of Australia. They didn't name it after him because he was the Prime Minister. Alfred Deakin was the government minister who travelled to California and asked the Chaffey brothers to come to Australia and design a town based on the irrigation colonies they had established in California.