Jump to content

Attention: In order to reply to messages, create topics, have access to other features of the community you must sign up for an account.
Via Garibaldi 8

7 Train Has Been Glitchy Since Modernization Launched, Transit President Admits

Recommended Posts

7 Train Has Been Glitchy Since Modernization Launched, Transit President Admits

Video: https://www.nbcnewyork.com/news/local/7-Train-Subway-Line-Glitches-Modernization-Problems-501920652.html?_osource=SocialFlowFB_NYBrand&fbclid=IwAR2zeUH-4g8SIzJrUd3Ua8NKGiRIcbftrsXwbJtH8pPZ4VkyEfbZv-_EYt0

It's been a week since the 7 train rolled out a new state-of-the-art system, but it hit a snag, causing headaches for commuters. Andrew Siff reports.

(Published Tuesday, Dec. 4, 2018)

WHAT TO KNOW

  • After a long-delayed modernization launched on the 7 line, it got glitchy the moment it went into service, the NYC Transit president admits
  • "The fact we have delays at the moment are indicative there are bugs in the software," Andy Byford said Tuesday
  • But Byford said he's still confident that given the resources, he can make the entire transit system state of the art within 10 years

If you're a 7 train rider who's been caught in an especially bad string of delays lately, you're not alone. 

Tens of thousands of people have been stuck along the 7 line in the past 10 days, after a long-delayed modernization of the subway line launched -- and got glitchy the moment it went into service, according to Transit President Andy Byford.

"The fact we have delays at the moment are indicative there are bugs in the software," Byford told city lawmakers Tuesday. "I have the contractor on speed dial." 

He said he's still confident that given the resources, he can make the entire transit system state of the art within 10 years. 

"What's really needed isn't maintaining status quo," said Byford." It's pushing on and modernizing this system." 

City lawmakers responded skeptically, especially with a request for billions of dollars from the state still in limbo, and a likely fare hike arriving this spring. 

"We are gonna increase fares on the backs of New Yorkers," said Queens councilman Donovan Richards. 

Byford said "that is a matter for the MTA board, and will only be taken when fare hearings have concluded." 

Share this post


Link to post
Share on other sites

The fact that the L has been CBTC since the 2000s and this project was so screwed up is disconcerting. I think it might be time to take a step back and ask if just re-signalling the subway system with upgraded wayside-block signaling is the way to go before dumping tens of billions into "Fast Forward"

Share this post


Link to post
Share on other sites
1 hour ago, shiznit1987 said:

The fact that the L has been CBTC since the 2000s and this project was so screwed up is disconcerting. I think it might be time to take a step back and ask if just re-signalling the subway system with upgraded wayside-block signaling is the way to go before dumping tens of billions into "Fast Forward"

This is a different CBTC system than the one on the (L) line. So I'm not surprised their are teething issues. I think the (7) line CBTC will be very reliable like the (L) one is once all the issues are sorted out.

 

 

  • Upvote 4

Share this post


Link to post
Share on other sites

Where are the open source alternatives to these things? Vendor lock-in and system incompatibilities were so Microsoft-era.

Share this post


Link to post
Share on other sites
13 hours ago, Via Garibaldi 8 said:

7 Train Has Been Glitchy Since Modernization Launched, Transit President Admits

Video: https://www.nbcnewyork.com/news/local/7-Train-Subway-Line-Glitches-Modernization-Problems-501920652.html?_osource=SocialFlowFB_NYBrand&fbclid=IwAR2zeUH-4g8SIzJrUd3Ua8NKGiRIcbftrsXwbJtH8pPZ4VkyEfbZv-_EYt0

It's been a week since the 7 train rolled out a new state-of-the-art system, but it hit a snag, causing headaches for commuters. Andrew Siff reports.

(Published Tuesday, Dec. 4, 2018)

WHAT TO KNOW

  • After a long-delayed modernization launched on the 7 line, it got glitchy the moment it went into service, the NYC Transit president admits
  • "The fact we have delays at the moment are indicative there are bugs in the software," Andy Byford said Tuesday
  • But Byford said he's still confident that given the resources, he can make the entire transit system state of the art within 10 years

If you're a 7 train rider who's been caught in an especially bad string of delays lately, you're not alone. 

Tens of thousands of people have been stuck along the 7 line in the past 10 days, after a long-delayed modernization of the subway line launched -- and got glitchy the moment it went into service, according to Transit President Andy Byford.

"The fact we have delays at the moment are indicative there are bugs in the software," Byford told city lawmakers Tuesday. "I have the contractor on speed dial." 

He said he's still confident that given the resources, he can make the entire transit system state of the art within 10 years. 

"What's really needed isn't maintaining status quo," said Byford." It's pushing on and modernizing this system." 

City lawmakers responded skeptically, especially with a request for billions of dollars from the state still in limbo, and a likely fare hike arriving this spring. 

"We are gonna increase fares on the backs of New Yorkers," said Queens councilman Donovan Richards. 

Byford said "that is a matter for the MTA board, and will only be taken when fare hearings have concluded." 

 

It's not about "bugs in the software" — the signals simply stop working when they get WET.

  • LMAO! 5

Share this post


Link to post
Share on other sites
1 hour ago, Gotham Bus Co. said:

 

It's not about "bugs in the software" — the signals simply stop working when they get WET.

Well the (7) will be useless if it snows and rain most of the winter....:D

Share this post


Link to post
Share on other sites
On 12/5/2018 at 6:26 PM, shiznit1987 said:

The fact that the L has been CBTC since the 2000s and this project was so screwed up is disconcerting. 

The (L) was very unreliable for several years after CBTC was completed on that line. It’s not surprising at all.

Share this post


Link to post
Share on other sites
4 hours ago, INDman said:

The (L) was very unreliable for several years after CBTC was completed on that line. It’s not surprising at all.

Do you know if there have been any issues with PATH?

Share this post


Link to post
Share on other sites
3 minutes ago, Union Tpke said:

Do you know if there have been any issues with PATH?

Yes, at times the signal system will go out or glitch out, according to my PATH yard friend.

But seriously, all those weekend G.O's just to have this shitty system? I'd rather had the old wayside system in place because its less prone to failure and wont go out when it's raining...

Share this post


Link to post
Share on other sites
16 hours ago, m7zanr160s said:

I like CBTC (7) train. The ride is so much smoother and faster everywhere.

A testament to just how terrible timer operation is in the system. AFAIK, no limits were changed as a part of CBTC, just the medium through which they were communicated. Properly done fixed blocks should have been capable of exactly what CBTC does today. 

  • Upvote 4

Share this post


Link to post
Share on other sites

Speed limits are raised when they install CBTC. The regular system sets limits based on how close the signals are. If they’re too close the limit has to be lowered to allow enough braking distance from when you first see the yellow to the red signal. CBTC doesn’t use that many signals so a lot of the speed signs are removed. Also there are no yellows because it knows exactly where the train ahead is. 

Edited by LexAveExp5

Share this post


Link to post
Share on other sites
23 minutes ago, LexAveExp5 said:

Speed limits are raised when they install CBTC. The regular system sets limits based on how close the signals are. If they’re too close the limit has to be lowered to allow enough braking distance from when you first see the yellow to the red signal. CBTC doesn’t use that many signals so a lot of the speed signs are removed. Also there are no yellows because it knows exactly where the train ahead is. 

This misses a good bit of nuance. Yes, signal spacing is determinate of maximum safe speed, but in a well designed fixed block system (as New York's was before WillyB), the maximum safe speed through an area is the speed around which the signals are spaced. Downwards deviation from those values is indicative not of limitations in fixed block technology, but instead of degradation in train brake performance. 

Again, CBTC is a cool technology, and should absolutely be installed as areas of the current system reach the end of their design lifetimes. The proposition that it increases capacity beyond throughput gains related to the elimination of human reaction time (+/- 5 seconds of extra margin), however, should indicate to a reader that there is obfuscation afoot. 

  • Upvote 4

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.