Gantry cam flash

cyber69

cyber69

cyber69

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Got off the M69 onto M6 heading towards Brum last night and three lanes where closed shortly after so got behind a lorry in the outer lane (doing under the speed limit of 40) and gantry cam went off! Any idea if they where flashing the lorry? Do these gantry cams flash lorries who might be in the wrong lane?

I'm keeping the footage just in-case.

Footage

https://imgur.com/a/ih6ptvq
 
I don't know if they've since solved it but perhaps 20 years ago there was a known issue where you could get flashed if there was a lorry nearby because the reflection off the side of the lorry screwed up the speed reading.

Was there a lorry to your rear left?
 
WJA96 said:
Certainly you're not in any danger - 29mph maximum.
Click to expand...

On replay it looks like I was underneath the gantry at the time of the flash so it got the lorry in-front of me for some reason? I guess they won't prosecute the lorry driver for being in the outer lane as there was roadworks at the time? Can a gantry cam discern if a lorry is in the outer lane and zap him?
 
I know these gantry cams can flash someone who is in a closed off lane but not sure if it can zap a lorry who is not supposed to be in the outer lane. Deffo did not zap me as it lit up the back of the lorry on the first and second flashes.
 
I didn't think they were intelligent enough to flash HGV / any vehicles that shouldn't be in the outside lane.

Perhaps the HGV was pushing over the speed limit?

There's a second flash towards the end of your clip as well, not sure if that's another gantry, or perhaps one on the other side of the road.

Edit: rewatched it again, it looks like the second flash was for behind you. Wonder if there was another HGV shortly behind you.
 
Happens often when pulling a tall trailer, that one looks pretty high, I’d guess around 15ft.

I’ve had the same when pulling tall trailers, never heard anything else about it mind you.

Wouldn’t stress about it.
 
Semple said:
I didn't think they were intelligent enough to flash HGV / any vehicles that shouldn't be in the outside lane.

Perhaps the HGV was pushing over the speed limit?

There's a second flash towards the end of your clip as well, not sure if that's another gantry, or perhaps one on the other side of the road.

Edit: rewatched it again, it looks like the second flash was for behind you. Wonder if there was another HGV shortly behind you.
Click to expand...

The U.K. motorway network has “WIM” (weight in motion) sensors in the road surface which combined with an ANPR reader determines if the weight recorded matches the rated capacity of the passing HGV.

Fairly sure it won’t trigger a camera to flash but it will alert the motorway police who are quick to pull such overloaded vehicles, be it trucks or indeed vans.

https://trans.info/en/british-systems-catch-overloaded-trucks-see-how-they-work-108579
 
It’s flashing due to the lorry being in lane 4 as mentioned above, it’ll get disregarded by the ticket office as the other three lanes were closed.
 
Scania said:
The U.K. motorway network has “WIM” (weight in motion) sensors in the road surface which combined with an ANPR reader determines if the weight recorded matches the rated capacity of the passing HGV.

Fairly sure it won’t trigger a camera to flash but it will alert the motorway police who are quick to pull such overloaded vehicles, be it trucks or indeed vans.

https://trans.info/en/british-systems-catch-overloaded-trucks-see-how-they-work-108579
Click to expand...

That's pretty damn impressive engineering wise tbh.
 
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