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      "url": "https://chicago.suntimes.com/transportation/2025/08/04/cta-canceled-bus-tracker-apps-ventra-transit",
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       "value": "The consequence: the CTA began sharing cancelled runs on 1 May 2025 so they no longer appear as scheduled buses; Transit adopted it days later, Ventra, Google Maps and Apple Maps to follow. Carries the CTA's June 2025 delivery figures — 98.8% of scheduled buses, 88% of scheduled trains — and weekday ridership at about 69% of 2019.",
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       "value": "Civic-tech group formed spring 2022, project page November 2022. Scrapes the CTA Bus Tracker getvehicles feed every five minutes and compares it with the CTA's own GTFS schedule; collection began 20 May 2022. The clearest case in the atlas of an agency feed used to audit the agency.",
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       "value": "Independent analysis of over 100 million real-time bus locations from the Ghost Buses archive, June 2022 to July 2024: 'The CTA initially decreased scheduled service in early 2022 through 2023 to match the slower real-time performance and later increased it in early 2024.' Metrics include excess wait time and actual versus scheduled buses by community area.",
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       "value": "Chronology: pilot 5 August 2006 on route 20/Madison, thirteen routes by March 2008, last routes May 2009, Train Tracker 8 January 2011. Also records the sequence behind the API — a Chicago developer reverse-engineered the Bus Tracker feeds before the CTA formally released one. No launch date for the official API is given here or in any source found, so none is claimed.",
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       "value": "Summarising the FTA-sponsored 'Traveler Information Systems and Wayfinding Technologies in Transit Systems' (2 May 2011): 'As a result, the Chicago Transit Authority (CTA) has a 92% accuracy rate for bus arrival prediction.' Self-reported by the CTA and relayed by a federal state-of-practice review, not an independent audit — recorded here rather than in the impact field. No independent evaluation of CTA prediction accuracy was found.",
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       "value": "Currency check: feed listed Active, service window beginning 7 July 2026, quality report last updated 11 July 2026.",
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}