Awesome article. The countdown clocks are generally accurate, but in certain situations they are surprisingly off. I would love to see someone use this data t

Awesome article. The countdown clocks are generally accurate, but in certain situations they are surprisingly off. I would love to see someone use this data to improve arrival predictions – a regression, say, based on features such as time of day (a proxy for crowding), weather, holidays, nearby events (concerts & sports), maintenance or signal problems... I assume the clocks use something as simple a static numbers representing the time between adjacent stations or segments. They presumably don’t tolerate deviations from crowding or other unexpecteds.