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.
NCTD's project page anticipated the platform "open to passengers in early 2027", while reporting from February 2026 has construction starting that spring and the station opening "in late-2027 or early-2028"; the date takes the later window.
Gives the current schedule: "As of February 2026, construction on the Downtown Platform is scheduled to begin in the spring" and "after 18 months of construction, the station will likely open in late-2027 or early-2028", along with the platform’s position between 1st and 5th Streets.[1]
February 2026 reporting that the extension would break ground that year, which is what puts the opening a year behind NCTD’s own early-2027 date.[1]
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