All 30 dual redlight & speed camera locations & their direction(confirmed myself) - Page 5 - Perth-WRX.com

s20525xxx · #41 02-07-2011, 07:41 PM

Quote:

Originally Posted by Elrico

I work for a different department of Downer eng, but we have a bloke that did 5 years in signals division. Im sure he knows all about this stuff, and where each one is excactly as he used to have to install some of them. Ill see if he knows how they work but im pretty sure there are induction coils in the road bases used to detect load. These help the traffic lights determine if there is a car waiting or not, especially when they are in priority mode at night. The red light camera uses these induction coils, when a light goes yellow the camera arms. Once the light is red, it uses the initial induction coil into the intersection as an activation and happy (or unhappy) snaps your picture.

The speed camera however i am not sure about. Wouldnt you say it would use the same technology as a multinova? Shoot a beam and wait for the reflection to determine if someone is speeding. Id have to ask i spose.

The induction coil is obviously the method for detecting red light running. I think the speed camera uses the coil as a starting point and laser beam, which came from one of the smaller head, as a reference point, then it calculate time a car travel between this length.

I think thats the possible explaination, while they cant be detected by V1 (the laser beam uses different frequancy more close to laser aligner), but still calculate speed pretty well with slightly high tolerance than poliscan.

s20525xxx · #42 02-07-2011, 07:47 PM

Quote:

Originally Posted by artman

Its a great map. Are you adding the ones installed (bot not yet working) as they become live?

last year, goverment said there will be 30 dual function camera installed, and there are exactly 30 dots marked on my map. Im pretty sure I covered all those money rolling machines.

jezzamcbezza · #43 02-07-2011, 08:53 PM

Quote:

Originally Posted by s20525xxx

The induction coil is obviously the method for detecting red light running. I think the speed camera uses the coil as a starting point and laser beam, which came from one of the smaller head, as a reference point, then it calculate time a car travel between this length.

I think thats the possible explaination, while they cant be detected by V1 (the laser beam uses different frequancy more close to laser aligner), but still calculate speed pretty well with slightly high tolerance than poliscan.

NO - they calculate your speed by measuring the time taken between the first and second strip in the road (time & distance known = speed calculated).

This speed is then verified by a second reading taken from the second and third strips in the road.

s20525xxx · #44 03-07-2011, 03:58 AM

Quote:

Originally Posted by jezzamcbezza

NO - they calculate your speed by measuring the time taken between the first and second strip in the road (time & distance known = speed calculated).

This speed is then verified by a second reading taken from the second and third strips in the road.

Thumbs up for you

Do you know everything about poliscan? I see speedcameralocation.com is selling poliscan manual for $20, which is banned by goverment.

tuna · #45 03-07-2011, 09:09 AM

No new cameras for killer black spots | Perth Now

http://www.perthnow.com.au/news/cops...-1226086224081

s20525xxx · #46 03-07-2011, 09:47 AM

Quote:

Originally Posted by tuna

Cops to tip off speeders | Perth Now

Will they really do it?

ImPreSiV · #47 03-07-2011, 01:40 PM

they've done it before - I'd say so

ImPreSiV · #48 03-07-2011, 01:41 PM

PS: There is a new fixed speed/redlight combo camera being installed facing North on Collier Rd / Tonkin Hwy intersection. It's not active yet, but will be by mid next week I'd say

RichX · #49 03-07-2011, 04:03 PM

Quote:

Originally Posted by jezzamcbezza

NO - they calculate your speed by measuring the time taken between the first and second strip in the road (time & distance known = speed calculated).

This speed is then verified by a second reading taken from the second and third strips in the road.

This is possible when you have the rubber counter on the road, but not from an induction circuit or whatever it's called.

Think about it, what happens when you get an 18 wheeler go over it ?? Flashes when the trailer goes over cause there are 2 axles right next to each other? Fail.

Kato · #50 03-07-2011, 04:12 PM

What jezza has said is exactly what it says on the police website.

An 18 wheeler wouldnt matter as it only calcs the time taken to go from one sensor to the next. Number of wheels doesnt matter.

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