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| 2019 || February 11 || Service hours/frequency/capacity || BART is scheduled to begin the Transbay Tube retrofitting project on this date.<ref>{{cite web|url = https://www.bart.gov/about/projects/eqs/retrofit|title = Transbay Tube Retrofit|publisher = Bay Area Rapid Transit}}</ref> This project will shift the start time for BART service from 4 AM to 5 AM, and reduce the service frequency after 9:30 PM through the transbay tube to 24 minutes per line rather than 20 minutes per line, to allow for single-tracking through the Transbay Tube. An Early Bird Express bus service will be used to serve riders who ride between 4 AM and 5 AM.<ref>{{cite web|url = https://www.bart.gov/news/articles/2018/news20180912-0|title = BART 5am opening Early Bird Express bus service plan to go before Board|date = September 12, 2018|accessdate = September 15, 2018|publisher = Bay Area Rapid Transit}}</ref> || Transbay Tube, but systemwide effects
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| 2019 || March 9 || Service disruption || At 2:45 AM on this day (Saturday) BART experiences a computer network failure. To recover properly from this failure, BART delays the start of dispatching trains to 9 AM, instead of the usual 6 AM start of Saturday service.<ref>{{cite web|url = https://www.bart.gov/news/articles/2019/news20190309|title = BART service resumes following earlier computer problem|date = March 9, 2019|accessdate = March 23, 2019|publisher = Bay Area Rapid Transit}}</ref> BART provides a more detailed update on March 14, and states that the last similar failure had happened in March 2006. The failure in 2006 was due to a human error when upgrading software, whereas the failure this time is due to a failure of a switch (i.e., a hardware failure). BART also describes efforts underway to September both reduce the incidence and mitigate the impact of such failures.<ref>{{cite web|url = https://www.bart.gov/news/articles/2019/news20190314|title = BART provides update on Saturday's computer network failure|date = March 14, 2019|accessdate = March 23, 2019}}</ref>|-| 2019 || November 1 (tentative) || New stations || The {{w|Milpitas station}} and {{w|Berryessa/North San José station}} are scheduled to open for revenue service at this time, based on projections made around the end of March 2018in February 2019.<ref>{{cite web|url = https://www.mercurynews.com/20182019/0602/1108/bart-testing-to-milpitassan-jose-berryessapicks-mayup-notnov-happen1-untilopening-latetentatively-2019set/|title = BART testing to Berryessa, Milpitas may not happen until late 2019|last = Richards|first = GarySan Jose picks up; Nov. 1 opening tentatively set|date = June 11February 8, 20182019|accessdate = January 21March 23, 2019|publisher = The Mercury News}}</ref> || Milpitas, Berryessa (North San Jose)
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