Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


eph



97 posts

Master Geek
+1 received by user: 39


Topic # 223680 12-Oct-2017 09:13
Send private message

Yesterday I was driving through the Waterview tunnel after some minor accident in the tunnel. Signs were saying left lane blocked, keep right. As soon as we hit the tunnel my radio immediately switched to repeating announcement along the lines "This is control room. Tunnel is partially blocked, keep your safe distance". I went through few stations and it was announced on some of those frequencies as well. It got a bit annoying after about a minute with no way to turn it off (without turning off the radio). The second I left the tunnel it switched back to the normal radio.

 

How does it work? Do they just broadcast on major radio station frequencies in the tunnel in emergencies?

 

Side note: when I was entering the tunnel the left lane was closed (X above). They must have opened it while I was in the tunnel since there were cars coming through it. Immediately people from the right lanes started to push into the left lane even though changing lanes is prohibited in the tunnel. Typical!

 

 

 

 


View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
10628 posts

Uber Geek
+1 received by user: 3292

Trusted
Lifetime subscriber

  Reply # 1882293 12-Oct-2017 09:18
3 people support this post
Send private message

Surprisingly clever. Not much use if your radio not on though..!






2850 posts

Uber Geek
+1 received by user: 627


  Reply # 1882294 12-Oct-2017 09:18
One person supports this post
Send private message
 
 
 
 


eph



97 posts

Master Geek
+1 received by user: 39


  Reply # 1882298 12-Oct-2017 09:23
Send private message

wellygary:

 

NZTA run a rebroadcast network within the tunnel,

 

https://www.stuff.co.nz/auckland/93771872/what-happens-if-there-is-an-accident-or-emergency-in-the-waterview-tunnel

 

 

Interesting! Thanks for the link.

 

 

 

"There is also full mobile and radio rebroadcast coverage, and an emergency telephone every 150m. "

 

 

 

I wonder what exactly does it mean though. If I'm on the phone does it just terminate my call and I get the announcement or something? Also I wonder what exactly does the rebroadcast cover? Did they pick some frequencies or something?


2123 posts

Uber Geek
+1 received by user: 635

Subscriber

  Reply # 1882301 12-Oct-2017 09:31
Send private message

 No it means normally you still get radio/cell in the tunnel, but sounds like they also have the ability to take over the AM/FM to broadcast their own message. I highly doubt they can take over the cell network.


3563 posts

Uber Geek
+1 received by user: 1361


  Reply # 1882305 12-Oct-2017 09:38
2 people support this post
Send private message

Seems like a good idea.  '99%' of the time there isn't an issue and the system allows motorist to listen to radio in the tunnel. 

 

The ability to do a PSA over radio when required justifies the investment in a radio re-broadcasting system.





Mike

BDFL - Memuneh
59637 posts

Uber Geek
+1 received by user: 10784

Administrator
Trusted
Geekzone
Lifetime subscriber

474 posts

Ultimate Geek
+1 received by user: 113

Subscriber

  Reply # 1882310 12-Oct-2017 09:43
Send private message

There's a lot of info about the tech here: https://www.fusionnetworks.co.nz/client-projects/waterview-tunnel/

 

It doesn't really mention the FM broadcast stuff specifically though.


3733 posts

Uber Geek
+1 received by user: 438

Trusted

  Reply # 1882312 12-Oct-2017 09:47
Send private message

If your car is able to take traffic program (no idea how this works) are these used as well?  I'd love to actually see something come on my screen (hate features that can't be used).

 

 





Previously known as psycik

NextPVR/OpenHAB: 
Gigabyte AMD A8 Brix --> Samsung LA46A650D via HDMI, NextPVR,OpenHAB with Aeotech ZWave Controller
Media:Chromecast v2, ATV4, Roku3, Raspberry PI temperature Sensors and Bluetooth LE Sensors,HDHomeRun Dual
Windows 2012 
Host (Plex Server/Crashplan): 2x2TB, 2x3TB, 1x4TB using DriveBender, Samsung 850 evo 512 GB SSD, Hyper-V Server with 1xW10, 1xW2k8, 2xUbuntu 16.04 LTS, Crashplan, NextPVR channel for Plex,NextPVR Metadata Agent and Scanner for Plex


410 posts

Ultimate Geek
+1 received by user: 77


  Reply # 1882384 12-Oct-2017 11:36
Send private message

One of the features of RDS is that ability to direct people to alternative stations


5519 posts

Uber Geek
+1 received by user: 1593

Trusted

  Reply # 1882386 12-Oct-2017 11:40
Send private message

Mattmannz:

 

One of the features of RDS is that ability to direct people to alternative stations

 

 

 

 

My Sony head unit has all these RDS/AF/TF/TA or what ever options on its own button and it has a horrible habit of when i turn the car on show for example George FM on screen but be playing the breeze, if i push the button for george FM it stays on the breeze and still states George FM on screen. 

Would it be related? 





Steam: Coil (Same photos as profile here)
Origin: Scranax
Currently playing on PC: Rust, Subnautica, CS:GO, AOE2 HD, BeamNG Drive, BF1.


2298 posts

Uber Geek
+1 received by user: 226


  Reply # 1882397 12-Oct-2017 12:03
Send private message

Long gone are the days of radio loss in the Lyttelton tunnel. But people still don't think and ask themselves 'hey, how come the radio hasn't stopped going despite being underground'

 

 

 

It's not a new thing (2003/2004 introduction here), but as pointed out. Directional antennas either end of tunnel here. They have receivers on all major stations and just send it down the yagi muting the output as required.

 

And now and then you even get reminded to turn on your park lights over it.


1575 posts

Uber Geek
+1 received by user: 687


  Reply # 1882409 12-Oct-2017 12:28
One person supports this post
Send private message

lxsw20:

 

 No it means normally you still get radio/cell in the tunnel, but sounds like they also have the ability to take over the AM/FM to broadcast their own message. I highly doubt they can take over the cell network.

 

 

Correct.  NZTA (or more accurately, WTJO, the alliance that operates the tunnel) owns the radio rebroadcast system, and with that the operators' ability to inject PA messages.  The carriers themselves own the cellphone transmission kit.





Don't use 'beefstew' as a password.  It's not stroganoff.


eph



97 posts

Master Geek
+1 received by user: 39


  Reply # 1882411 12-Oct-2017 12:30
2 people support this post
Send private message

Oblivian:

 

Long gone are the days of radio loss in the Lyttelton tunnel. But people still don't think and ask themselves 'hey, how come the radio hasn't stopped going despite being underground'

 

 

 

It's not a new thing (2003/2004 introduction here), but as pointed out. Directional antennas either end of tunnel here. They have receivers on all major stations and just send it down the yagi muting the output as required.

 

 

Yeah looks like they can only cover limited amount of stations. Though I saw some using something called "radiating cable", might be better for longer/curved tunnels?

 

 

 

Oblivian:

 

And now and then you even get reminded to turn on your park lights over it.

 

 

Do they really say PARK lights?? What's the point of using park lights? Almost invisible anyway, why not use proper lights?

 

 

 

 


835 posts

Ultimate Geek
+1 received by user: 117

Trusted

  Reply # 1882428 12-Oct-2017 12:56
Send private message

eph:

 

Yeah looks like they can only cover limited amount of stations. Though I saw some using something called "radiating cable", might be better for longer/curved tunnels?

 

 

Typically in tunnel broadcasting systems use the leaky feeder cable to provide short distance transmissions along the length of the tunnel.

 

The Mt Victoria tunnel system here in Wellington (just a little older than the Waterview tunnel) has the ability to inject audio across each of the FM stations from Kaukau (the main FM transmitter for Wellington).If every FM channel was in use, that would be 23 stations to interrupt simultaneously. It doesn't re-transmit the low power stations that anyone can use however. 

 

Edit: formatting


7257 posts

Uber Geek
+1 received by user: 2313

Subscriber

  Reply # 1882547 12-Oct-2017 16:35
Send private message

 

 

Do they really say PARK lights?? What's the point of using park lights? Almost invisible anyway, why not use proper lights?

 

  

 

 

Because its single lane each way and there is no need for full headlights.

 

Full headlights are recommended in the waterview tunnel as its multi lane, and you shouldn't be changing lanes (. It allows you to see other cars in your mirrors better.

 

I dont believe they can enforce the no lane changing in the tunnel with the way the current rules are written, as solid white lines dont prohibit drivers from changing lanes they only discourage them. they only advise against it as it will minimise crashes from lane changes in the tunnel.


 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Fujifilm X beats its best with new top of the range, high-performance camera
Posted 24-Feb-2018 14:05


One million kiwis affected by cybercrime
Posted 24-Feb-2018 13:58


New Zealanders want to engage with government online and via mobile apps
Posted 24-Feb-2018 13:56


Samsung launches Samsung Max
Posted 24-Feb-2018 13:52


CPTPP text and National Interest Analysis released for public scrutiny
Posted 21-Feb-2018 19:43


Foodstuffs to trial digitised shopping trolleys
Posted 21-Feb-2018 18:27


2018: The year of zero-login, smart cars & the biometrics of things
Posted 21-Feb-2018 18:25


Intel reimagines data centre storage with new 3D NAND SSDs
Posted 16-Feb-2018 15:21


Ground-breaking business programme begins in Hamilton
Posted 16-Feb-2018 10:18


Government to continue search for first Chief Technology Officer
Posted 12-Feb-2018 20:30


Time to take Appleā€™s iPad Pro seriously
Posted 12-Feb-2018 16:54


New Fujifilm X-A5 brings selfie features to mirrorless camera
Posted 9-Feb-2018 09:12


D-Link ANZ expands connected smart home with new HD Wi-Fi cameras
Posted 9-Feb-2018 09:01


Dragon Professional for Mac V6: Near perfect dictation
Posted 9-Feb-2018 08:26


OPPO announces R11s with claims to be the picture perfect smartphone
Posted 2-Feb-2018 13:28



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.