Home PageFacebookRSS News Feed
PocketGPS
Web
SatNav,GPS,Navigation
Pocket GPS World - SatNavs | GPS | Speed Cameras: Forums

Pocket GPS World :: View topic - Why are "grid line cameras" not in PocketGPS UK SC
 Forum FAQForum FAQ   SearchSearch   UsergroupsUsergroups   ProfileProfile   Log in for private messagesLog in for private messages   Log inLog in 

Why are "grid line cameras" not in PocketGPS UK SC

 
Post new topic   Reply to topic    Pocket GPS World Forum Index -> Points Of Interest (POIs)
View previous topic :: View next topic  
Author Message
CS
Lifetime Member


Joined: Feb 29, 2004
Posts: 113

PostPosted: Fri Apr 30, 2004 12:15 am    Post subject: Why are "grid line cameras" not in PocketGPS UK SC Reply with quote

Why are the gridline camera detection lines not included in PocketGPS UK SC database? I can't remember what they are called but I'm sure it begins with a "T". Idon't know how they work but as you are about to pass one the telltale signs are these:

3 gridlines embedded across just half the road approx 8" apart

small concrete type post about 3 feet tall opposite gridlines on roadside with a flat surface facing towards gridlines

Does anyone have any information about these "camera detectors" if indeed that is what they are. There are plenty of them in York area. Exactly what are they and how do they work? If they are "safety cameras" should they be listed in the PocketGPS UK SC database??
Back to top
View user's profile Send private message
DavidW
Pocket GPS Moderator
Pocket GPS Moderator


Joined: 17/05/2003 02:26:21
Posts: 3747
Location: Bedfordshire, UK

PostPosted: Fri Apr 30, 2004 8:08 am    Post subject: Reply with quote

There are some temporary sites like this in mid Bedfordshire, near where I live - though I think they're all out of use now. There were permanent sensors in the road (which I think may be pneumatic), which fed into a bollard where the camera could be connected. It looked like a video camera on a lowish tripod.

These sites are only active if the camera is connected - and I think in those cases they're manned. They seem to be obsolete, at least around here - laser from the back of a van seems to be used instead.


The T you're thinking of is Truvelo - it looks a bit like a Gatso, but the support arm between the post and the camera is often painted blue. The sensor is inductive loops in the road rather than radar (though I believe there's now some inductively operated Gatsos). If a Truvelo site is missing, that's just because nobody has submitted it.



David
Back to top
View user's profile Send private message Send e-mail
CS
Lifetime Member


Joined: Feb 29, 2004
Posts: 113

PostPosted: Fri Apr 30, 2004 10:05 am    Post subject: Reply with quote

Thanks to David for setting me straight. However the question remains should these sites be reported to the PocketGPS team?
Back to top
View user's profile Send private message
Darren
Frequent Visitor


Joined: 11/07/2002 14:36:40
Posts: 23848
Location: Hampshire, UK

PostPosted: Fri Apr 30, 2004 10:13 am    Post subject: Reply with quote

As DavidW has said they are semi permanent installations where the induction loops are installed in the road surface and a small post nearby contains the hookup to which a Traffic Car plugs it's speed measuring equipment.

The problem with such sites is two fold, firstly we need to be sure that it is indeed a speed trap site rather than a traffic census installation and secondly when users receive alerts and see no cameras or traffic cars they report them to us as incorrect and it is then difficult for us to verify the true status of the site.

I am moving towards producing a seperate database for mobile installations, so that users know that it is a 'possible' danger zone and not necesarily always active, this will have a different icon using a Gatso on a Tripod. Hopefully this way we can reduce the false warnings.

I have provided the initial icon and database download at http://www.griffinnet.co.uk/downloads.htm which contains only three sites so far but feel free to use this as the basis. If anyone knows of such sites, regular haunts for traffic cars or safety partnership camera vans etc then provide me with the Lat/Lon and any information or your database .ov2 file and I'll start building up this database.

In a similar fashion I intend stripping out Red Light cameras to a seperate database when time allows!
_________________
Darren Griffin
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Tim Buxton
Pocket GPS Moderator
Pocket GPS Moderator


Joined: 14/09/2002 20:56:18
Posts: 5231
Location: Surrey, United Kingdom

PostPosted: Fri Apr 30, 2004 10:33 am    Post subject: Reply with quote

David,

Quote:
The T you're thinking of is Truvelo - it looks a bit like a Gatso, but the support arm between the post and the camera is often painted blue.


Truvelo cameras are forward facing, and use IR as opposed to a flash for illuminating the target when necessary. They are permanent, nor semi-permanent.
_________________
Tim
Back to top
View user's profile Send private message Send e-mail Visit poster's website
DavidW
Pocket GPS Moderator
Pocket GPS Moderator


Joined: 17/05/2003 02:26:21
Posts: 3747
Location: Bedfordshire, UK

PostPosted: Fri Apr 30, 2004 1:24 pm    Post subject: Reply with quote

A lot of the Truvelo installations in Bedfordshire are bidirectional - the camera can be swung from one side of the road to the other, and there's sensors on both sides of the road to support this type of operation.

Unlike a Gatso (which, on all the sites I've seen, use a visible light flash that would blind a driver), the IR flash allows a Truvelo to be forward facing, and the single direction Truvelos that I've seen are all forward facing.


They are indeed permanent installations.



David
Back to top
View user's profile Send private message Send e-mail
matt_e
Lifetime Member


Joined: 06/06/2003 21:23:45
Posts: 176
Location: London, United Kingdom

PostPosted: Fri Apr 30, 2004 7:43 pm    Post subject: Reply with quote

I wish the speed cams POI only contained speed cams - the red light cameras are IMHO a pain. Firstly I would never consider jumping a red light. Secondly there are so many red light cameras in my area of London that the alarm is going off all the time. Grrr. Wink
Back to top
View user's profile Send private message
Darren
Frequent Visitor


Joined: 11/07/2002 14:36:40
Posts: 23848
Location: Hampshire, UK

PostPosted: Mon May 03, 2004 2:55 pm    Post subject: Reply with quote

matt_e wrote:
I wish the speed cams POI only contained speed cams - the red light cameras are IMHO a pain. Firstly I would never consider jumping a red light. Secondly there are so many red light cameras in my area of London that the alarm is going off all the time. Grrr. Wink


It is on the to do list Smile, I personally don't believe we need these full stop, anyone jumping a red light deserves whatever they get but others disagree so I'll be moving them to a seperate .ov2 file which you can choose to install if you wish or leave out completely Thumbs Up
_________________
Darren Griffin
Back to top
View user's profile Send private message Send e-mail Visit poster's website
matt_e
Lifetime Member


Joined: 06/06/2003 21:23:45
Posts: 176
Location: London, United Kingdom

PostPosted: Mon May 03, 2004 6:14 pm    Post subject: Reply with quote

Sounds good Darren Thumbs Up

Matt
Back to top
View user's profile Send private message







Posted: Today    Post subject: Pocket GPS Advertising

Back to top
Display posts from previous:   
Post new topic   Reply to topic    Pocket GPS World Forum Index -> Points Of Interest (POIs) All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Make a Donation



CamerAlert Database

Click here for the PocketGPSWorld.com Speed Camera Database

Download Speed Camera Database
22.105 (30 Oct 24)



WORLDWIDE SPEED CAMERA SPOTTERS WANTED!

Click here to submit camera positions to the PocketGPSWorld.com Speed Camera Database


12mth Subscriber memberships awarded every week for verified new camera reports!

Submit Speed Camera Locations Now


CamerAlert Apps



iOS QR Code






Android QR Code







© Terms & Privacy


GPS Shopping