This dataset contains historic Link Definitions and Performance Statistics with Geometry of traffic flow. The detailed documentation is included at
https://www.data.act.gov.au/dataset/realtime-traffic/cjkg-rvmu.
Disclaimer : Even though the real-time API updates the info every 30 seconds, we only sample at every 5 minutes for historical archiving

In the ACT, we have bluetooth detectors placed in certain roads to monitor traffic flow that provides network-wide performance indicators in real time. Details about congestion & travel time can be accessed via APIs provided in this dataset