Bit harsh.

[BTB 500]

Depends on the Police force

It does, but in reality they nearly all use the same guidelines.

https://www.kent.police.uk/advice/advice-and-information/rs/road-safety/speeding/if-youve-received-a-speed-camera-activation-letter-or-notice/#:~:text=The%20police%20will%20consider%20the,in%20a%2030%20mph%20area

That says the same as I posted i.e. up to 86 mph (in a 70 limit), and no course done in the last 3 years.

 

[BTB 500]

Another colleague got one of those for 46 on the M42 variable when it was set to 40 at 6AM in the morning for no apparent reason.

We regularly use the motorways early in the morning, and seemingly spurious limits when there's virtually no traffic (often shown on just one gantry, and without the normal 'end of restriction' afterwards) are common.

 

[E55BOF]

Warch out for HADECS cameras on their gantries. There are I think no cameras in any of the overhead boxes on the M25, and possibly none anywhere in overhead boxes, and the HADECS are easily spotted, not least by the two or three small grey cylindrical cameras on a pole mast about 100 yards before the actual camera installation.

 

[SW18]

Warch out for HADECS cameras on their gantries. There are I think no cameras in any of the overhead boxes on the M25, and possibly none anywhere in overhead boxes, and the HADECS are easily spotted, not least by the two or three small grey cylindrical cameras on a pole mast about 100 yards before the actual camera installation.

What are the pairs of cameras ahead of the Hadecs? I've seen them and wondered...

 

[E55BOF]

They are there on Smart Motorways to record the limit actually showing on the gantry when a limit lower than 70 was in force.

 

[ALFAitalia]

I got 1 through the door 103 on the M62 j9-j10 smart motorway
No points or fine as it took too long to process (6 month's is the limit)

Lucky....A friend had a similar stroke of luck. He was on 6 points and got snapped twice....one on one week....and one on the next....so was expecting the worst and took legal advice. What got him off was that the NIP for the second offence had been processed and received before the first one. Some old unused law says that's not allowed and they have to come in the order the offences were committed. Case dismissed!. Sometimes legal advice is worth the money.....and he's a jammy git....always has been!!

 

[BTB 500]

Another colleague got one of those for 46 on the M42 variable when it was set to 40 at 6AM in the morning for no apparent reason.

We were on the M42 at 07:30 today and had 60 then 40 limits with 'queue, caution' for a couple of miles. Road was completely clear, then after that the gantry signs were just blank. How far do you go before assuming NSL now applies?

At other points we also had a random '60' limit shown on just the middle lane on one gantry, and elsewhere 'End' shown with nothing on any of the previous gantries.

 

[ALFAitalia]

We get that "End" message quite a bit on the M27....always frightens the life out of me that I missed something.....so far so good!

 

[E55BOF]

We were on the M42 at 07:30 today and had 60 then 40 limits with 'queue, caution' for a couple of miles. Road was completely clear, then after that the gantry signs were just blank. How far do you go before assuming NSL now applies?

At other points we also had a random '60' limit shown on just the middle lane on one gantry, and elsewhere 'End' shown with nothing on any of the previous gantries.

I think that, legally, lhe last shown limit applies until a sign indicates it has changed. However, it would be a VERY hard-hearted copper in an unmarked car who would do you in the circumstances you describe. The limit signs on the M25 sometimes behave like that too, but on the stretch I mainly use, I know exactly where the camera installations are...

If ever the HADECS, or whatever replaces them in due course, become average speed cameras, those of us who like to 'make progress' are b******d...

 

[ALFAitalia]

They had those HADECS cameras either end of a Cornish village I drove through last week.....I was behind a tractor so I was fine.....but I was not sure what they were until I googled them ......and there were no "Average Speed Check" type signs either....which I thought was a legal requirement..

 

[E55BOF]

The only legal requirement is a speed camera warning sign on the approach. However, afaik no HADECS with an averaging capability have been installed so far.

 

[NewbieAMG]

I think that, legally, lhe last shown limit applies until a sign indicates it has changed. However, it would be a VERY hard-hearted copper in an unmarked car who would do you in the circumstances you describe. The limit signs on the M25 sometimes behave like that too, but on the stretch I mainly use, I know exactly where the camera installations are...

If ever the HADECS, or whatever replaces them in due course, become average speed cameras, those of us who like to 'make progress' are b******d...

What also annoys me in instances like these - people that accelerate earlier than you see the end sign. Even if I’m in the left hand lane, you get overtaken by lorries and then you start thinking did I miss something?

 

[Spider10]

For the average speed camera to catch you it needs to be linked to at least 2 other camera's NOT between 2 camera's which is why you see plenty of people over taking you if you know you know
The smart motorway course is good for something

 

[23 Romeo Tango]

For the average speed camera to catch you it needs to be linked to at least 2 other camera's NOT between 2 camera's which is why you see plenty of people over taking you if you know you know

Are you suggesting that there needs to be at least 3 cameras?
If I'm understanding the links and quotes below, I'm not sure your comment is correct.

Average speed cameras: how do they work? | Carbuyer
Individual cameras don't have the facility to measure vehicle speed – a car must pass a second camera for its average speed to be calculated. In a sequence of multiple cameras, it is at the discretion of the local enforcement agency as to whether cameras work in pairs or in larger groups.

Average Speed Cameras Explained and How They Work
Number plates are read via ANPR as vehicles pass through the fields of view of each camera and the average speed of the vehicle is calculated between any two cameras.

https://www.theaa.com/driving-advice/legal/speed-cameras
Average speed cameras work by recording your speed at two different points.


The drivers you see overtaking you may be leaving the route before the second/next camera, therefore their average speed between the two cameras can't be calculated.

 

[ALFAitalia]

The drivers you see overtaking you may be leaving the route before the second/next camera, therefore their average speed between the two cameras can't be calculated.

That won't work as most of the time they have a camera on or just before the slip road on.

And you do only need 2 cameras for average speed monitoring....on some of the short sections of 50 mph on the M27 (when they were doing the smart motorway work) there were only two cameras...and a few villages I've been through have them at either end of the village.

 

[markjay]

...and a few villages I've been through have them at either end of the village.

Great. So you can drive into the village as if it was the last stretch of the Nürburgring, then half way through the village stop at the local for a pint, then accelerate out of the village drag-racing style, and all is well........

 

[ALFAitalia]

Now you have given me an idea!....Also they are front facing.....bikers don't even slow down!

 

[23 Romeo Tango]

That won't work as most of the time they have a camera on or just before the slip road on.

Most of the time.

So some of the time it would work?

Please read my signature.

 

[Bobby Dazzler]

Great. So you can drive into the village as if it was the last stretch of the Nürburgring, then half way through the village stop at the local for a pint, then accelerate out of the village drag-racing style, and all is well........

Yes, but you didn’t see me, right?

 

[markjay]

...and a few villages I've been through have them at either end of the village.

Great. So you can drive into the village as if it was the last stretch of the Nürburgring, then half way through the village stop at the local for a pint, then accelerate out of the village drag-racing style, and all is well........

The obvious problem is: how many villages are there on your route? You might escape being caught speeding, but you could end up getting a ban for being over the limit....