This is certainly true - and furthermore is useful all around the year as well.
As with most sites like this there are special apps which can be downloaded to your smartphone - but a quick web search will provide quite a useful website nevertheless.
- A direct link can be found here: https://www.livetraffic.com
- A similar search for the BOM ( Bureau of Meteriology) will also be useful and again there are apps for our smartphones as well. http://www.bom.gov.au