Help - Search - Members - Calendar
Full Version: A3 Speed Camera Van: Where does it measure speeds?
FightBack Forums > Queries > Technical Discussion of Enforcement Devices
Spinstorm
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?
BaggieBoy
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.
cp8759
The enforcement threshold is 79, you have nothing to worry about if you were doing 73
Spinstorm
So someone is actually operating them?

You are saying there are two people sitting side by side with laser guns?
Jlc
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.
BaggieBoy
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.
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2018 Invision Power Services, Inc.