Now BART has to slow trains in outlying areas due to possible heat related rail problems.
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Release Date: 9/1/2017
# BART Reducing Speed Systemwide during Heat Wave
As a precaution against potential rail movement, BART will be reducing speeds between noon and 8 p.m. on most outdoor parts of the system for the duration of this regional heat wave. Riders should anticipate travel time increases of 10 to 20 minutes.
BART is taking this unusual step in response to the extreme temperatures forecast for the Bay Area over the next several days. BART rail is heat-treated prior to installation, which allows for thermal expansion and contracti
Weleded rail is a technology that has yet to be fully mastered through wide ranging weathter conditions - without operational restrictions during the extremes.
The heat in the Bay Area is unusual, there was at least one day in the last week where San Francisco had a hotter high temperature than Phoenix. With at least 2/3rd of BART’s track being at grade or elevated, they are justified in their caution.
Weather here is SoCal has been a bit different as well, outdoor thermometer was showing 88F at 4AM. This made me wonder if the outdoor sender was broken, but NWS website showed a nearby station reporting the same thing. FWIW, temp at 11AM was 78F.
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