Jacob Alperin-Sheriff
@democraticluntz.bsky.social
The congestion pricing rationale was as much about reducing commute times for obligate drivers as anything else
June 8, 2025 at 2:02 PM
The congestion pricing rationale was as much about reducing commute times for obligate drivers as anything else
Okay but I can’t imagine a US mayor proudly saying they’re gonna do something at the expense of private vehicle use
June 8, 2025 at 2:01 PM
Okay but I can’t imagine a US mayor proudly saying they’re gonna do something at the expense of private vehicle use
I didn’t post it I just saw this from Moshe Lion
June 6, 2025 at 4:25 PM
I didn’t post it I just saw this from Moshe Lion
The subway hero episode of 30 Rock outweighs some deaths of suicidal people imo
May 29, 2025 at 3:12 PM
The subway hero episode of 30 Rock outweighs some deaths of suicidal people imo
IE unlike the Golden Gate Bridge or a cliff it’s a two step process, you’re not dying from jumping into the tracks alone, need train to hit
May 27, 2025 at 12:39 PM
IE unlike the Golden Gate Bridge or a cliff it’s a two step process, you’re not dying from jumping into the tracks alone, need train to hit
Either way, why waste precious transit funds on this it’s clearly orthogonal to automation AND surely far more expensive than several dozen sensors per station to alert for track obstructions.
May 27, 2025 at 12:38 PM
Either way, why waste precious transit funds on this it’s clearly orthogonal to automation AND surely far more expensive than several dozen sensors per station to alert for track obstructions.
I think it’s more “people not having to see someone else die” they still have 2A option
May 21, 2025 at 10:31 PM
I think it’s more “people not having to see someone else die” they still have 2A option
How is that related to automation?
May 21, 2025 at 10:30 PM
How is that related to automation?
Ah, what is the purpose/need for these?
May 21, 2025 at 12:30 PM
Ah, what is the purpose/need for these?
And surely operators had bidirectional comms prior to?
May 21, 2025 at 12:11 PM
And surely operators had bidirectional comms prior to?
Didn’t they do that when they upgraded for continuous cellphone reception
May 21, 2025 at 12:08 PM
Didn’t they do that when they upgraded for continuous cellphone reception
And the idea is that the automation will allow reduced headways between trains?
May 21, 2025 at 11:57 AM
And the idea is that the automation will allow reduced headways between trains?
Are they relying on sensors on the track that weren’t there before to let trains know where other trains locations are as a failsafe beyond GPS? How have they been doing it prior, via voice comms “I’m between stations A and B?”
May 21, 2025 at 11:57 AM
Are they relying on sensors on the track that weren’t there before to let trains know where other trains locations are as a failsafe beyond GPS? How have they been doing it prior, via voice comms “I’m between stations A and B?”
IE those exist already on every car they’re just manually activated no?
May 21, 2025 at 11:53 AM
IE those exist already on every car they’re just manually activated no?
Oh I didn’t think of the fail gracefully issue.
The signaling and doors should surely be in the tens of thousands per train at most to hook into the automation computer system (minus software writing)
The signaling and doors should surely be in the tens of thousands per train at most to hook into the automation computer system (minus software writing)
May 21, 2025 at 11:53 AM
Oh I didn’t think of the fail gracefully issue.
The signaling and doors should surely be in the tens of thousands per train at most to hook into the automation computer system (minus software writing)
The signaling and doors should surely be in the tens of thousands per train at most to hook into the automation computer system (minus software writing)
Why would automation costs scale linearly with miles of track? Maybe with number of stations
May 21, 2025 at 11:51 AM
Why would automation costs scale linearly with miles of track? Maybe with number of stations
Also 1 billion per mile isn’t plausibly as much as 50 times what it could be realistically like this could be
May 21, 2025 at 11:28 AM
Also 1 billion per mile isn’t plausibly as much as 50 times what it could be realistically like this could be
I just can’t understand how they could price it at 3-4 times the cost of 1 from scratch Waymo car per rail car in the system especially when most of the infrastructure necessary is there
May 21, 2025 at 11:27 AM
I just can’t understand how they could price it at 3-4 times the cost of 1 from scratch Waymo car per rail car in the system especially when most of the infrastructure necessary is there
Okay but building a tunnel seems wildly more expensive than integrating already existing sensors to feed into software and writing software to automate (child’s play relatively speaking)
May 21, 2025 at 11:25 AM
Okay but building a tunnel seems wildly more expensive than integrating already existing sensors to feed into software and writing software to automate (child’s play relatively speaking)
Uh … that just makes it even worse to cost $5.6 billion
May 21, 2025 at 11:23 AM
Uh … that just makes it even worse to cost $5.6 billion
How does BART manage to get to 10 minute headways when it has a quadruple tracked section and significant interlining?
May 9, 2025 at 12:52 PM
How does BART manage to get to 10 minute headways when it has a quadruple tracked section and significant interlining?
It’s not about risk it’s about reality
May 9, 2025 at 12:40 PM
It’s not about risk it’s about reality