In 2016, John Ronan EI7IG traveled to the ARRL-TAPR Digital Communication Conference in the US where he gave a presentation on using APRS (Amateur Packet Reporting System) to track vehicles and bikes on the Sean Kelly cycle event.
The video of the talk was put up on YouTube in the last week by Gary Pearce, KN4AQ as part of his Ham Radio Now video series.
In the talk, John outlines some of the technical issues and difficulties in covering this large cycle event and making sure that the emergency services can be deployed where they are needed.
1) Sean Kelly Tour
2) John EI7IG's website