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> For example two days ago there was a horrific final-destination-esque crash in which a motorcyclist happened to be in front of the train. Isn't Bart entirely

> For example two days ago there was a horrific final-destination-esque crash in which a motorcyclist happened to be in front of the train. Isn't Bart entirely grade-separated? But yes, no ability to single-track is an issue. The non-standard rail gauge is also an ongoing issue. Everything has to be custom. Compare this to Caltrain. Several years ago, they wanted to add capacity. They bought off-the-shelf Bombardier cars from an agency in Socal. I'm not sure if they ever even painted them, but they could use them almost immediately.

Anechoic 4y ago
Isn't Bart entirely grade-separated? Yes, but portions run near/under/over/alongside/in the median of roadway traffic. If you read the tweet thread you can see that a driver on the road was ejected into the BART ROW and was hit by a train.
bluGill 4y ago
Bart is running India broad guage. While it's isn't a common standard, most off the shelf trains can be ordered with that wheel width. Though they might be stuck with made in America rules that limit their ability to order trains to fit.
iggldiggl 4y ago
> But yes, no ability to single-track is an issue. Though it's not an absolute panacea, either. The Washington subway has crossovers every two to three stations and is set up for bi-directional operation on one track, and the two things I immediately noticed when I visited Washington eight or so years ago were: - service levels on weekends were already only meh even without construction works - there were construction works on a very small segment of the Red Line between two of those aforementioned crossovers – those works only required closing one track, so they decided to continue running a service on the remaining track. Unfortunately single-tracking severely limits the number of trains you can run, so that tiny closure meant that on that weekend the whole length of the Red Line (all 32 miles of it!) was only operating every 20 minutes or so (originally I had considered an accommodation along the Red Line, luckily I had reconsidered and chosen a different place to stay even before learning about those construction works). After some googling, it seemed that this (i.e. construction works on a tiny stretch of track significantly affecting the service of the whole line even during the daytime, at least at weekends) was not an uncommon occurrence in Washington. While single-tracking might be no problem late at night (when a reduced frequency doesn't matter that much, and might not be even all that much reduced as compared to normal service levels at that time of the day), or during unplanned short-term disruptions, for that kind of scheduled-in-advance all-day construction works I'd say it's at least debatable whether a complete closure of the affected stretch of track (with a bus replacement service) and a full service on the whole rest of the line might not be a better compromise…

Anechoic 4y ago

Isn't Bart entirely grade-separated? Yes, but portions run near/under/over/alongside/in the median of roadway traffic. If you read the tweet thread you can see that a driver on the road was ejected into the BART ROW and was hit by a train.

bluGill 4y ago

Bart is running India broad guage. While it's isn't a common standard, most off the shelf trains can be ordered with that wheel width. Though they might be stuck with made in America rules that limit their ability to order trains to fit.

iggldiggl 4y ago

> But yes, no ability to single-track is an issue. Though it's not an absolute panacea, either. The Washington subway has crossovers every two to three stations and is set up for bi-directional operation on one track, and the two things I immediately noticed when I visited Washington eight or so years ago were: - service levels on weekends were already only meh even without construction works - there were construction works on a very small segment of the Red Line between two of those aforementioned crossovers – those works only required closing one track, so they decided to continue running a service on the remaining track. Unfortunately single-tracking severely limits the number of trains you can run, so that tiny closure meant that on that weekend the whole length of the Red Line (all 32 miles of it!) was only operating every 20 minutes or so (originally I had considered an accommodation along the Red Line, luckily I had reconsidered and chosen a different place to stay even before learning about those construction works). After some googling, it seemed that this (i.e. construction works on a tiny stretch of track significantly affecting the service of the whole line even during the daytime, at least at weekends) was not an uncommon occurrence in Washington. While single-tracking might be no problem late at night (when a reduced frequency doesn't matter that much, and might not be even all that much reduced as compared to normal service levels at that time of the day), or during unplanned short-term disruptions, for that kind of scheduled-in-advance all-day construction works I'd say it's at least debatable whether a complete closure of the affected stretch of track (with a bus replacement service) and a full service on the whole rest of the line might not be a better compromise…