Each tweet takes one of two forms and is consistently formatted, making it easy to parse and extract information. Here are a couple of examples with the interesting parts highlighted in bold:
Between 16:00 and 18:30 today, 26% of trips experienced delays. #sydneytrains
The worst delay was 16 minutes, on the 18:16 City to Berowra via Gordon service. #sydneytrains
The take-home message: expect delays somewhere most days but in particular on Monday mornings, when students return to school after the holidays, and if you’re travelling in the far south-west or north-west of the network.