The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
The project's own history page says "When it enters service on 28 March 2027, the CDG Express[2] will realise a vision first imagined more than 30 years ago".
The operator’s own timetable page, which carries the service pattern the pin states and its source page does not: "one train every 15 minutes, from 5 am to midnight, 7 days a week, both ways."[1]
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most.