I have written in the past about my collection effort for the real-time positions of public transport vehicles in Turin (see here for some details about the GTFS Realtime data). I have already analysed the GTFS RT data for a single line in 2024, showing the average speeds of a bus route during the summer break, in this post (in Italian). Months before that, I started to explore other real-time vehicle location data, but still only for a single line and a single month (see this post). While these analyses yielded interesting results, a stronger and more systemic methodology was needed to be able to compare the speeds across different months.

In order to all this, I decided