Average speed cameras and a speed limit

[Feral Kid]

Can anyone advice how fast can you go when there is 40mph speed limit with average speed cameras? I've noticed on Westway where I travel quite often that when I go 40mph (shown on GPS) most of the cars that are overtaking me, are going much faster than I do.
I heard that it's 10% of speed limit + 2mph with normal speed cameras, but don't know if that applies to ASC too.
Also, are the GPS speedometers are showing your actual speed? How accurate are they?

[stinkwheel]

[Kickstart]

[Cali747]

I got fined last year whilst driving my car, on new year's day going through those 13 mile roadworks on the A1 northbound up near Scotch Corner..They have those Average Speed cameras there and I was clocked doing 55MPH and the limit was 50... I do not know how they average it out though. Is it between cameras or over the entire section of the limit? Does anyone know how that works? I just assumed it was over the whole section but I guess that is why I got caught out by going a wee bit too fast between cameras.

[Hawkeye1250FA]

Its between two cameras (at the moment)

They do have plans to cover the entire planet in them and then intelligently figure it if you got from the start of your journey (Manchester) to the end of your journey (Nottingham) in a time that would have guaranteed you sped...

But thats years away yet.

I regularly to 56 / 57 in the 50s (average speed cameras) on the M6 when there are no workmen around.

You would need to be REALLY lucky (unlucky?) to get a massive clear run not being slowed down by other folk doing exactly 50 to allow your average to get high enough to get done..

I usually get about halfway between them at 56 and then get slowed right down to 50... Then they pull over then I get back up to 56, but by then we've left that "section" of average cameras and am now between the next two - where part of my starting speed was 50mph... (repeat)

[SophR so good]

I was done for 53 in 50 on the m6 last year. Not worth risking imo, cars may be overtaking you but they also may be going home to a fine.
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You win again, gravity! - Zap Brannigan, BCF BBQ 2016

[Rogerborg]

[stinkwheel]

My impression was it's between any two cameras in the network you're on. But that each network only covers its own area for now.

So the ones in the 50 limits on the A1(M) are seperate networks for each 50 limit. Go over an average of 50 while you're in the limit and they'll get you but if you averaged 90mph between the last and first camera of two different 50 limits, you're fine (for now).

Conversely, the whole of the A9 in Scotland is one long SPECS system. So in theory you could leave the A9, horse it up a different road then rejoin it quite a distance further up. If your average between the last camera to "see" you and the latest one would have been over the limit, you'd get a fine.

The above is hypothetical but possible, it would also mean you'd have to have been absolutely honking it along the other roads but I could see it happening (say if you did Dalwhinnie to Kingussie. 15 miles on the A9, 20 miles on the Old Military Road which is a real hoot). My previous caveat still applies to the A9 system in particular. I've only seen one rear facer on that network.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Pete.]

I don't think the new ones on the A2 only work in 'fixed pairs' (when they get activated that is). There are several single ones stuck on the slip roads etc, and going Kent-bound at Black Prince there's one just before the off-slip and then a pair further up just before the 50 limit ends. If any of these were exclusively paired then there would be a gap in the cover. I think they now work in groups.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[M.C]

[Pete.]

This FOI reply suggests that speed is calculated between ANY two cameras using the new system:

https://www.whatdotheyknow.com/request/enquiry_about_the_coverage_of_ne
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[SophR so good]

[Rogerborg]

Fair play, I'd take the course, although I couldn't promise to not [citation needed] sperg-rage out during it.
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Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[SophR so good]

They can fail you if you do haha. You are allowed to stare blankly at a wall and dispute the finer interpretations of the highway code though. Good course for thickos though, myself and the other biker were the only ones who got 100% on their test 0.0
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You win again, gravity! - Zap Brannigan, BCF BBQ 2016

[talkToTheHat]

use satnav to get a good idea of how far your speedo overreads by. An indicated 85 on my bandit's clocks is about 70 on the satnav. I do the localish average 50 zones with i think 60 on my clocks, which is keeping up with traffic and perhaps slightly gaining. I cheat though becasue satnav monitors average speed in zones it knows about.
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Bandit. does. everything.

[Vandervecken]

Depends on quite a few factor
Each different Police force sets its own limits North Wales and Essex used to have parity not sure they still do? think Scotland is heading that way if it has not already.

The level at which prosecution happens is also set by each force, and at what speed what sanction is appropriate.
Therefore there is no difference between and average speed camera and a fixed point as far as being prosecuted.

The 10% +2 thing is ACPO guidelines so though most police forces adhere to these there is no legal reason they can't drop below this level for acting. Though in reality I would have thought that if set very close to or at the speed limit so much paperwork would be generated the department dealing with the sending of letters would be inundated.

There are a lot of dummy and inactive average speed cameras out there too but your guess is as good as mine on that one .

What level your speedo is set is a good one, mines approx 10% above speed limit. Never rely on this

Long and short of it though is be aware and try not to get yourself in a position to receive an unpleasant and unexpected letter.
Though perhaps easier said than done.
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CB600F Hornet.
Previously many a Fazer

[Vandervecken]

Depends on quite a few factor
Each different Police force sets its own limits North Wales and Essex used to have parity not sure they still do? think Scotland is heading that way if it has not already.

The level at which prosecution happens is also set by each force, and at what speed what sanction is appropriate.
Therefore there is no difference between and average speed camera and a fixed point as far as being prosecuted.

The 10% +2 thing is ACPO guidelines so though most police forces adhere to these there is no legal reason they can't drop below this level for acting. Though in reality I would have thought that if set very close to or at the speed limit so much paperwork would be generated the department dealing with the sending of letters would be inundated.

There are a lot of dummy and inactive average speed cameras out there too but your guess is as good as mine on that one .

What level your speedo is set is a good one, mines approx 10% above speed limit. Never rely on this

Long and short of it though is be aware and try not to get yourself in a position to receive an unpleasant and unexpected letter.
Though perhaps easier said than done.
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CB600F Hornet.
Previously many a Fazer

[ScaredyCat]

[Analogkid]

[M.C]

Copilot screams at you if you're speeding (say 30 in a 20 zone as everyone does). I've never tried it through an average camera zone but assuming it knows the speed on that bit of road it should work.

[talkToTheHat]

[SBDJ]

TomTom have promised an update early this year to resolve the Bluetooth issues with the riders. I will believe it when I see it
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1998 ZX9R C1
1998 YZF600R Thundercat

[Hong Kong Phooey]

I can advice.

After a long time working on it I know the answer, though you're really not going to like it, it's...

42
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'81 CG125, '97 FZS600 : '99 CBR600F4, '09 KTM RC8