This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
link to Electric-Bikes.com leads tn 'oops we are sorry' page. —Preceding unsigned comment added by 212.159.43.76 ( talk) 21:56, 18 January 2008 (UTC)
If someone wants to take photos or create a map of the Heathrow system, this sketch shows where it will be. -- SEWilco ( talk) 17:03, 22 January 2008 (UTC)
I've noticed that the Heathrow system will use parking lot style, one-way, angled stalls for loading and unloading passengers instead of the previously more common all-in-a-line style loading and unloading. In almost all previous PRT designs, the cars enter the station on a continuous siding and passengers unload near the entrance point of siding and load on the side of the station where the siding exits the station. With this new design, not only are the stations offline, the passenger load/unload stalls are further offline. Intuitively, it seems to increase capacity by allowing slower passengers avoid interfering with faster passengers. But it also seems to slightly complicate the command and control functions. Has anyone read about this change?
By the way, I noticed that Google Earth now has a great shot of the Cardiff test facility with the new loading stall design: ULTra Cardiff (I hope) -- JJLatWiki ( talk) 18:10, 22 January 2008 (UTC)
The in-a-line style stations was all that was (easily) possible with previous systems. They rode a guiderail, typically steered by small runner wheels at the front of the vehicle. The rail had to be continuous, so it's not a trivial exercise to produce a number of "docks", as each one would require a switch or break in the guiderail. This would be further complicated by the fact that the guidewheels would have to be able to run onto the rails from either direction, which would not be simple. I know of no older PRT that can back up.
ULTra has no guiderail, reading its location from the track and steering itself internally. That eliminates all complications on the guidance, and makes backing up trivial. I assume there is some sort of local-area controller in the stations themselves to indicate free docks and tell the vehicles when they are allowed to back up. See Cabinentaxi for an example of station logic.
As a Canadian I can say that ULTra would never fly here. We have this white stuff called "snow" that, after a brief period, compacts into another material called "ice". Wheeled vehicles take a random amount of time to start and stop on ice and snow, so your headways get trampled and route capacity nosedives. You can fix a lot of this by using a LIM, which means you don't need the wheels to have any traction at all. But then that blows your infrastructure costs, you need larger vehicles to make up for it, and you end up with Bombardier ART. Sad though.
Maury Markowitz ( talk) 13:03, 11 December 2009 (UTC)
Yeah, that's what they thought for the ICTS (now known as the ART). What happens is that wet snow blows onto the track and then wind evaporatively cools it into a thin sheet of ice. Very bad! Works fine in Vancouver though. Maury Markowitz ( talk) 18:00, 11 December 2009 (UTC)
I can't find any mention of the battery life anywhere. How long does a charge last and how long does it take to recharge? This could be ULTRa's biggest problem - too many vehicles waiting to be recharged. 173.58.251.147 ( talk) —Preceding undated comment added 02:25, 16 March 2010 (UTC).
DrFrench recently renamed the article and all mentions of "ULTra" to "Ultra", citing the MOS, but the MOS says mixed-case trademarks are a decision left to editor discretion, and I believe it was better with mixed case. ULTra is short for "Urban Light Transport", so the name ULTra is actually more of an acronym than a simple trademark. We wouldn't write Ibm or At&t, and I don't think this should be Ultra.
If there are no objections in the next few days, I will change it back. ATren ( talk) 02:11, 9 May 2010 (UTC)
The company uses "Ultra" and not "ULTra" on their web-pages. The article should use the same name IMHO. Hubba ( talk) 18:49, 21 January 2012 (UTC)
Well, spring of 2010 came and went and obviously the service has not opened. Has anyone heard of the latest scheduled opening? Some googling revealed nothing. Vectro ( talk) 02:13, 22 August 2010 (UTC)
By the time these things go live they'll be covered in more cobwebs than the adams family's house. Back ache ( talk) 10:26, 8 June 2011 (UTC)
Does anyone know why? It it a delay in regulator approval or is it a technical problem? Paul Studier ( talk) 21:01, 8 June 2011 (UTC)
Hello fellow Wikipedians,
I have just modified 4 external links on ULTra (rapid transit). Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 18 January 2022).
Cheers.— InternetArchiveBot ( Report bug) 05:54, 23 December 2017 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on ULTra (rapid transit). Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 18 January 2022).
Cheers.— InternetArchiveBot ( Report bug) 11:12, 25 January 2018 (UTC)
It has been proposed in this section that
ULTra (rapid transit) be
renamed and moved to
Ultra (rapid transit). A bot will list this discussion on requested moves' current discussions subpage within an hour of this tag being placed. The discussion may be closed 7 days after being opened, if consensus has been reached (see the closing instructions). Please base arguments on article title policy, and keep discussion succinct and civil. Please use {{
subst:requested move}} . Do not use {{
requested move/dated}} directly. |
ULTra (rapid transit) → Ultra (rapid transit) – Per MOS:TM, follow standard English text formatting and capitalization rules, even if the company considers the name preference official. We should revert to that name. Aitraintheeditorandgamer ( talk) 23:50, 16 March 2024 (UTC) — Relisting. BD2412 T 02:33, 24 March 2024 (UTC)
This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
link to Electric-Bikes.com leads tn 'oops we are sorry' page. —Preceding unsigned comment added by 212.159.43.76 ( talk) 21:56, 18 January 2008 (UTC)
If someone wants to take photos or create a map of the Heathrow system, this sketch shows where it will be. -- SEWilco ( talk) 17:03, 22 January 2008 (UTC)
I've noticed that the Heathrow system will use parking lot style, one-way, angled stalls for loading and unloading passengers instead of the previously more common all-in-a-line style loading and unloading. In almost all previous PRT designs, the cars enter the station on a continuous siding and passengers unload near the entrance point of siding and load on the side of the station where the siding exits the station. With this new design, not only are the stations offline, the passenger load/unload stalls are further offline. Intuitively, it seems to increase capacity by allowing slower passengers avoid interfering with faster passengers. But it also seems to slightly complicate the command and control functions. Has anyone read about this change?
By the way, I noticed that Google Earth now has a great shot of the Cardiff test facility with the new loading stall design: ULTra Cardiff (I hope) -- JJLatWiki ( talk) 18:10, 22 January 2008 (UTC)
The in-a-line style stations was all that was (easily) possible with previous systems. They rode a guiderail, typically steered by small runner wheels at the front of the vehicle. The rail had to be continuous, so it's not a trivial exercise to produce a number of "docks", as each one would require a switch or break in the guiderail. This would be further complicated by the fact that the guidewheels would have to be able to run onto the rails from either direction, which would not be simple. I know of no older PRT that can back up.
ULTra has no guiderail, reading its location from the track and steering itself internally. That eliminates all complications on the guidance, and makes backing up trivial. I assume there is some sort of local-area controller in the stations themselves to indicate free docks and tell the vehicles when they are allowed to back up. See Cabinentaxi for an example of station logic.
As a Canadian I can say that ULTra would never fly here. We have this white stuff called "snow" that, after a brief period, compacts into another material called "ice". Wheeled vehicles take a random amount of time to start and stop on ice and snow, so your headways get trampled and route capacity nosedives. You can fix a lot of this by using a LIM, which means you don't need the wheels to have any traction at all. But then that blows your infrastructure costs, you need larger vehicles to make up for it, and you end up with Bombardier ART. Sad though.
Maury Markowitz ( talk) 13:03, 11 December 2009 (UTC)
Yeah, that's what they thought for the ICTS (now known as the ART). What happens is that wet snow blows onto the track and then wind evaporatively cools it into a thin sheet of ice. Very bad! Works fine in Vancouver though. Maury Markowitz ( talk) 18:00, 11 December 2009 (UTC)
I can't find any mention of the battery life anywhere. How long does a charge last and how long does it take to recharge? This could be ULTRa's biggest problem - too many vehicles waiting to be recharged. 173.58.251.147 ( talk) —Preceding undated comment added 02:25, 16 March 2010 (UTC).
DrFrench recently renamed the article and all mentions of "ULTra" to "Ultra", citing the MOS, but the MOS says mixed-case trademarks are a decision left to editor discretion, and I believe it was better with mixed case. ULTra is short for "Urban Light Transport", so the name ULTra is actually more of an acronym than a simple trademark. We wouldn't write Ibm or At&t, and I don't think this should be Ultra.
If there are no objections in the next few days, I will change it back. ATren ( talk) 02:11, 9 May 2010 (UTC)
The company uses "Ultra" and not "ULTra" on their web-pages. The article should use the same name IMHO. Hubba ( talk) 18:49, 21 January 2012 (UTC)
Well, spring of 2010 came and went and obviously the service has not opened. Has anyone heard of the latest scheduled opening? Some googling revealed nothing. Vectro ( talk) 02:13, 22 August 2010 (UTC)
By the time these things go live they'll be covered in more cobwebs than the adams family's house. Back ache ( talk) 10:26, 8 June 2011 (UTC)
Does anyone know why? It it a delay in regulator approval or is it a technical problem? Paul Studier ( talk) 21:01, 8 June 2011 (UTC)
Hello fellow Wikipedians,
I have just modified 4 external links on ULTra (rapid transit). Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 18 January 2022).
Cheers.— InternetArchiveBot ( Report bug) 05:54, 23 December 2017 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on ULTra (rapid transit). Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 18 January 2022).
Cheers.— InternetArchiveBot ( Report bug) 11:12, 25 January 2018 (UTC)
It has been proposed in this section that
ULTra (rapid transit) be
renamed and moved to
Ultra (rapid transit). A bot will list this discussion on requested moves' current discussions subpage within an hour of this tag being placed. The discussion may be closed 7 days after being opened, if consensus has been reached (see the closing instructions). Please base arguments on article title policy, and keep discussion succinct and civil. Please use {{
subst:requested move}} . Do not use {{
requested move/dated}} directly. |
ULTra (rapid transit) → Ultra (rapid transit) – Per MOS:TM, follow standard English text formatting and capitalization rules, even if the company considers the name preference official. We should revert to that name. Aitraintheeditorandgamer ( talk) 23:50, 16 March 2024 (UTC) — Relisting. BD2412 T 02:33, 24 March 2024 (UTC)