HADECS 3. Distance to capture?
HADECS 3. Distance to capture?
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Discussion

usn90

Original Poster:

2,034 posts

99 months

Thursday 25th August 2022
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Travelling on the M6 this afternoon, after plenty of 60mphs gantry’s I failed to notice one had turned to 50mph.

Looking back on the dash cam I went through at 59mph, there were no speed camera lines on the road for me to go from, so how far passed the camera will it go off?

All I can go from are the lane separation lines, by the time I went passed the 6th line I was at 51mph

livinginasia

966 posts

139 months

Thursday 25th August 2022
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Not all gantry’s have cameras. Are you sure there was a camera there? You would be able to see it off to the left in your dashcam video.

surveyor_101

5,069 posts

208 months

Thursday 25th August 2022
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you need to bare in mind that only 1 in so many gantries are operating although I am not famillar with M6 in particular.


usn90

Original Poster:

2,034 posts

99 months

Thursday 25th August 2022
quotequote all
There was a camera, I can see it on the footage.

I’m not sure if it was working or not, I usually just assume all of them are

littleredrooster

6,360 posts

225 months

Thursday 25th August 2022
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usn90 said:
There was a camera, I can see it on the footage.

I’m not sure if it was working or not, I usually just assume all of them are
Where exactly was the camera? Was it on a bracket to the nearside of the motorway, or was it over each lane? Did your dashcam pick up the flash?

Gareth79

9,015 posts

275 months

Thursday 25th August 2022
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I've seen them go off, the flash is pretty damned bright and would surely be caught on dashcam.

VSKeith

1,956 posts

76 months

Thursday 25th August 2022
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Gareth79 said:
I've seen them go off, the flash is pretty damned bright and would surely be caught on dashcam.
+1

Shiv_P

3,036 posts

134 months

Thursday 25th August 2022
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I thought HADECS 3 don't flash

usn90

Original Poster:

2,034 posts

99 months

Thursday 25th August 2022
quotequote all
The camera was on a bracket mounted to the side of the gantry.

I didn’t notice the camera flash, however I was too busy checking my mirror for anyone behind and then the Speedo , would a forward facing dash cam really pick up the flash on a clear sunny day?

littleredrooster

6,360 posts

225 months

Thursday 25th August 2022
quotequote all
usn90 said:
The camera was on a bracket mounted to the side of the gantry.

I didn’t notice the camera flash, however I was too busy checking my mirror for anyone behind and then the Speedo , would a forward facing dash cam really pick up the flash on a clear sunny day?
OK, so very probably a live camera.

If you can look at the camera footage frame-by-frame, you may just be able to see the flash (if it happened), otherwise I think it’s in the lap of the gods.

Good luck!

survivalist

6,124 posts

219 months

Thursday 25th August 2022
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littleredrooster said:
usn90 said:
The camera was on a bracket mounted to the side of the gantry.

I didn’t notice the camera flash, however I was too busy checking my mirror for anyone behind and then the Speedo , would a forward facing dash cam really pick up the flash on a clear sunny day?
OK, so very probably a live camera.

If you can look at the camera footage frame-by-frame, you may just be able to see the flash (if it happened), otherwise I think it’s in the lap of the gods.

Good luck!
If he only had a forward facing dashcam it may not be obvious.

BertBert

21,235 posts

240 months

Friday 26th August 2022
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I'd be surprised if a forward facing cam would see the flash from behind on a sunny day.

littleredrooster

6,360 posts

225 months

Friday 26th August 2022
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BertBert said:
I'd be surprised if a forward facing cam would see the flash from behind on a sunny day.
I too would be amazed, but there's the slenderest of chances that a reflection may be visible on another vehicle. Clutching at straws...

nismo48

6,962 posts

236 months

Friday 26th August 2022
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littleredrooster said:
usn90 said:
The camera was on a bracket mounted to the side of the gantry.

I didn’t notice the camera flash, however I was too busy checking my mirror for anyone behind and then the Speedo , would a forward facing dash cam really pick up the flash on a clear sunny day?
OK, so very probably a live camera.

If you can look at the camera footage frame-by-frame, you may just be able to see the flash (if it happened), otherwise I think it’s in the lap of the gods.

Good luck!
Fingers crossed for you..smile

RazerSauber

2,894 posts

89 months

Friday 26th August 2022
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59mphin a 50? You should be locked up for life.

Does your footage show when it changed? I believe they give you a small grace period when it changes. I've read anywhere between 10 seconds and a minute but could be a old (new?) wives tale for all I know.

I've seen a fair few people flashed by these so I'm sure if it had flashed, you'd have noticed or the camera would've picked it up. I've got no idea if they can snap you without a flash though. Cross your fingers and pray to the speed camera gods for the next fortnight.

martinbiz

3,695 posts

174 months

Friday 26th August 2022
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usn90 said:
Travelling on the M6 this afternoon, after plenty of 60mphs gantry’s I failed to notice one had turned to 50mph.

Looking back on the dash cam I went through at 59mph, there were no speed camera lines on the road for me to go from, so how far passed the camera will it go off?

All I can go from are the lane separation lines, by the time I went passed the 6th line I was at 51mph
59 on your Speedo is probably around 56/57 so right on the cusp, all you can really do is wait and hope it was 56

jondude

2,441 posts

246 months

Friday 26th August 2022
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Is there a chance the 59 on the dashcam is more than actual speed as with most speedos? In my runabout 60 mph on the speedo is 55 on the Garmin....so perhaps you were doing 54-55? That might well be within the guidelines for issuing a ticket.

To be honest I am not sure how accurate a GPS unit is ( I presume the dashcam uses GPS?) but I think Garmin say within 1-2 mph.

But OK, you will still have the 14 day sweat now as yes, does sound like whatever way you look at it, you were over 50mph.

usn90

Original Poster:

2,034 posts

99 months

Friday 26th August 2022
quotequote all
On the footage it was “50” for as long as I can make it out so it didn’t just change as I went under unfortunately.

My Speedo is 1 mph out.
Cruise set to 60mph
Tomtom 59mph
Dash cam 59mph

Obviously no one to blame other than myself, It was 60mph for ages, then this 50 then back to 60 at the following gantry, obviously to catch numpties like myself out, frustrating as I’ve basically worked the day for free if the fine comes through.

Another one was Monday, no restrictions so 70mph, then one suddenly changed to 40mph with a camera, followed by some dangerous braking ahead, wouldn’t mind but it was all for no obvious reason other than to cashgrab as it was back to 70 at the very next gantry,

Shiv_P

3,036 posts

134 months

Friday 26th August 2022
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https://www.speedcamerasuk.com/hadecs-speed-camera...

Answer: There is no visible flash emitted by HADECS 3 speed cameras. The unit next to the camera helps to provids an invisible infra-red flash to aid the camera to operate at night and in low light condition.

VSKeith

1,956 posts

76 months

Friday 26th August 2022
quotequote all
Shiv_P said:
https://www.speedcamerasuk.com/hadecs-speed-camera...

Answer: There is no visible flash emitted by HADECS 3 speed cameras. The unit next to the camera helps to provids an invisible infra-red flash to aid the camera to operate at night and in low light condition.
The one I passed the other night (new yellow camera on new 'smart' section, M27) can't have been HADECS 3 then, as it flashed a lit up patrol car in L3