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caniwi Occasional Visitor
Joined: Apr 20, 2006 Posts: 2
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Posted: Thu Apr 20, 2006 11:47 am Post subject: Appropriate Speed Camera Alert Distances |
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Hi all, could anyone please give me advice for setting appropriate speed camera alert distances? In particular, the difference between fixed and mobile cameras. What is the range of these different camera types? I need to know how far each separate type can "see" to set my alerts correctly.
Any help/advice very much appreciated.
Thanks |
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PaulB2005 Pocket GPS Moderator
Joined: Jan 04, 2006 Posts: 9323 Location: Durham, UK
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Posted: Thu Apr 20, 2006 12:48 pm Post subject: |
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I set mine so i get amble warning to check my speed and adjust according to the camera type. Fixed 30 seconds and Mobile 60 seconds (they can be pointed at you from a LONG range).
Knowing the cameras effective capture area and using it to set the alert distance isn't really appropriate as the Fixed sites have a very short capture area but you don't really want the warning at the last minute. Decide how long YOU need to adjust your driving before you get to the camera and use that as a guide. Don't forget Mobile can face forward and capture over long distances. |
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missing_user
Joined: Aug 30, 2008 Posts: -7
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Posted: Thu Apr 20, 2006 4:01 pm Post subject: |
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I set the warning for 'mobile' units at 1200metres [the M4 mobile cameras are reputed to catch you at 1000metres] and 'statics/gatso' units at 600metres. |
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Fri Apr 21, 2006 5:54 pm Post subject: |
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I have statics ranging from 250yds @30 to 450 yds @70 |
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Border_Collie Pocket GPS Verifier
Joined: Feb 01, 2006 Posts: 2543 Location: Rainham, Kent. England.
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Posted: Fri Apr 21, 2006 6:16 pm Post subject: |
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Some time back MikeAlder jogged my brain into coming up with the following.
Mph - 30s - 20s - 15s - 10secs warning.
80 - 1173- 782 - 587 - 391 yards
70 - 1026- 684 - 513 - 342
60 - 879 - 586 - 440 - 293
50 - 732 - 488 - 366 - 244
40 - 588 - 392 - 294 - 196
30 - 441 - 294 - 221 - 147
20 - 294 - 196 - 147 - 98
I've added a buffer e.g the 30 second warning at 70mph shown as 1026 yards, is actually the distance required for a 30 second warning at 80mph, the 60mph at 879 yards is actually for70mph etc. _________________ Formerly known as Lost_Property
And NO that's NOT me in the Avatar. |
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caniwi Occasional Visitor
Joined: Apr 20, 2006 Posts: 2
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Posted: Sun Apr 23, 2006 6:21 pm Post subject: |
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Thanks very much guys. Very helpful and appreciated. |
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lupos0_1 Lifetime Member
Joined: Sep 08, 2005 Posts: 765 Location: Berkshire
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Posted: Sun Apr 23, 2006 6:34 pm Post subject: |
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I still believe that this should be made into a sticky.
The times on here are very helpful _________________ -------------------------------------------------------
Nokia N95
McGuider V7
Latest Maps
(Internal GPS) |
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Border_Collie Pocket GPS Verifier
Joined: Feb 01, 2006 Posts: 2543 Location: Rainham, Kent. England.
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Posted: Mon Apr 24, 2006 1:52 am Post subject: |
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I've just re-read my post and there may be a misunderstanding. I wrote..
Quote: |
Mph - 30s - 20s - 15s - 10secs warning.
80 - 1173- 782 - 587 - 391 yards
70 - 1026- 684 - 513 - 342
60 - 879 - 586 - 440 - 293
50 - 732 - 488 - 366 - 244
40 - 588 - 392 - 294 - 196
30 - 441 - 294 - 221 - 147
20 - 294 - 196 - 147 - 98
I've added a buffer e.g the 30 second warning at 70mph shown as 1026 yards, is actually the distance required for a 30 second warning at 80mph, the 60mph at 879 yards is actually for70mph etc. |
I confused myself there and it's not quite what I meant.
These are the figures I recommend using...
Mph - 30s - 20s - 15s - 10secs warning.
70 - 1173- 782 - 587 - 391 yards
60 - 1026- 684 - 513 - 342
50 - 879 - 586 - 440 - 293
40 - 732 - 488 - 366 - 244
30 - 588 - 392 - 294 - 196
20 - 441 - 294 - 221 - 147
If you set the 50mph at 732 yards, top set of figures, you'll get a 30 second warning, but if you are travelling at 60mph, in a 50mph zone, you'd get less. Therefore you would need to set the 50mph warning as 879 yards.
The figures in bold, above, gives you a 10mph buffer throughout the range. _________________ Formerly known as Lost_Property
And NO that's NOT me in the Avatar. |
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lupos0_1 Lifetime Member
Joined: Sep 08, 2005 Posts: 765 Location: Berkshire
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Posted: Mon Apr 24, 2006 2:31 pm Post subject: |
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Not that you condone speeding of course _________________ -------------------------------------------------------
Nokia N95
McGuider V7
Latest Maps
(Internal GPS) |
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Border_Collie Pocket GPS Verifier
Joined: Feb 01, 2006 Posts: 2543 Location: Rainham, Kent. England.
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Posted: Mon Apr 24, 2006 4:43 pm Post subject: |
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Quote: | Not that you condone speeding of course |
Er! Hang on..... I'll think of something in my defence....................
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Still thinking........
Yes..... Er, well........ Put it this way. If everyone is 'bombing' down the outside lane at 80mph, it leaves the inside lane empty for me to 'tootle' along and take in the scenery. :D
(Pheeew! I think I got away with it). _________________ Formerly known as Lost_Property
And NO that's NOT me in the Avatar. |
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DaveCole Occasional Visitor
Joined: Feb 27, 2006 Posts: 1
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Posted: Wed Apr 26, 2006 12:25 pm Post subject: |
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I think paranoia rules to a point - the attached link shows you the ACPO guidelines for laser speed detection devices and other systems. Laser is by far the most common detection system in use by mobile safety vans - the maximum range they are permitted to operate at is 2000ft, although they may be capable of reaching much greater range.
As for fixed sites, they are limited to very short ranges dictated by the position of marks on the road or position of sensor loops. SPECS works on an average speed between several cameras linked in a system.
Read the policy here http://www.acpo.police.uk/asp/policies/Data/RPET%20Manual%20version%202-3.pdf
What your GPS/alarm system won't tell you is where a police patrol has set up a random check! With target aquisition of around 0.3 seconds, your alarm will often only tell you you've just been caught! Drive safely within the speed limit and none of the above applies. |
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