[kibibyte]

You seem to know thing or two about BART's rail infrastructure. I want to pick your brain on something.

The new BART fleet is much nicer than the old fleet in many respects, except for one very big issue: when a few drops of water fall onto the track, they have to slow down all the trains traveling through affected parts of the system. Worst case in my experience, this increases my travel time by 33%, which really adds up on the longer distance rides. My understanding is that in the rain, the new trains are just too good at applying brakes to all the wheels when they detect the wheels slipping on the tracks, and as a result, the wheels grind against the track to create flat spots. The current mitigation is to slow down the train, and it doesn't sound like they've figured out a long term solution yet.[0]

Your point about the system having a "nonstandard wheel profile and corresponding rail profile" stood out to me here. So I'm wondering, just how nonstandard is that? And is this wheel flat problem something exclusive to BART (and, perhaps a result of this nonstandard wheel profile)?

[0] https://www.nbcbayarea.com/investigations/bart-wet-weather-b...