Printable Version of Topic

Click here to view this topic in its original format

FightBack Forums _ Technical Discussion of Enforcement Devices _ A3 Speed Camera Van: Where does it measure speeds?

Posted by: Spinstorm Thu, 11 Jan 2018 - 19:17
Post #1346286

I spotted a camera van on the A3 south dual 3 lane carriageway heading to the M25; speed limit 70mph.

I was going about 73mph maximum and when I saw it slowed down to 65. Also there was a car in front of me and a car to the left of me. I doubt I will get a NIP for that but this leads to my question... where does the camera takes the cars speed from?

On overhead cameras there are markings on the road... and with a laser its pointed at you.

On a 3 lane carriageway where are they taking the readings from? How far away?

Posted by: BaggieBoy Thu, 11 Jan 2018 - 19:24
Post #1346290

You already stated how:

QUOTE (Spinstorm @ Thu, 11 Jan 2018 - 19:17) *
with a laser its pointed at you.

Can be used up to 1000m.

Posted by: cp8759 Thu, 11 Jan 2018 - 19:37
Post #1346296

The enforcement threshold is 79, you have nothing to worry about if you were doing 73

Posted by: Spinstorm Thu, 11 Jan 2018 - 19:38
Post #1346297

So someone is actually operating them?

You are saying there are two people sitting side by side with laser guns?

Posted by: Jlc Thu, 11 Jan 2018 - 19:53
Post #1346303

QUOTE (Spinstorm @ Thu, 11 Jan 2018 - 19:17) *
where does the camera takes the cars speed from?

It fires a series of pulses at the car (in around 1/3 second) and the distance and speed can be calculated. No markings on the road are necessary.

Posted by: BaggieBoy Thu, 11 Jan 2018 - 21:57
Post #1346346

QUOTE (Spinstorm @ Thu, 11 Jan 2018 - 19:38) *
So someone is actually operating them?

You are saying there are two people sitting side by side with laser guns?

Probably just a single person, that's the normal mode of operation.

Powered by Invision Power Board (http://www.invisionboard.com)
© Invision Power Services (http://www.invisionpower.com)