Traffic Master Cameras

aardvaak

Are Traffic Master Cameras there to monitor traffic flows and conditions digitally or do they monitor in real time ie actual photos?

Car_54

AFAIK they use ANPR to identify vehicles entering and leaving each road segment, and thus calculating their average speeds.

aardvaak

Car_54 wrote: »

AFAIK they use ANPR to identify vehicles entering and leaving each road segment, and thus calculating their average speeds.

Do they only calculate average speeds then?

Is it the Traffic Master Company that monitor them or who?

I can see the calculate using ANPR but do they have a live picture?

topdaddy_2

PTFM shouldnt capture live more a digitised image.

aardvaak

topdaddy wrote: »

PTFM shouldnt capture live more a digitised image.

What do you mean by PTFM?

BeenThroughItAll

Trafficmaster cameras, IIRC, read the whole plate but only use the middle four or five characters of it to work out when cars enter and leave a zone, comparing the time taken to traverse the zone with a rolling average to identify whether traffic is easing, building up or static.


They do not store the details of the plates they read, or calculate speeds for storage.


Some information from the HA here:


http://www.highways.gov.uk/traffic-information/traffic-information-services/traffic-cameras/cameras-fair-processing-notice/

aardvaak

BeenThroughItAll wrote: »

Trafficmaster cameras, IIRC, read the whole plate but only use the middle four or five characters of it to work out when cars enter and leave a zone, comparing the time taken to traverse the zone with a rolling average to identify whether traffic is easing, building up or static.


They do not store the details of the plates they read, or calculate speeds for storage.

here:


http://www.highways.gov.uk/traffic-information/traffic-information-services/traffic-cameras/cameras-fair-processing-notice/

Which I think brings me back to what I originally thought they are only there to to calculate road speeds and conditions but not for enforcement etc?

Am I correct?

BeenThroughItAll

aardvaak wrote: »

Which I think brings me back to what I originally thought they are only there to to calculate road speeds and conditions but not for enforcement etc?

Am I correct?

They do not technically calculate average speed, they only count number of cars and the average time taken to traverse a zone. The two are not inherently linked, so although it is technically possible for the TM system to calculate a speed based on time/distance, it doesn't.


They are NOT used for enforcement.

BeenThroughItAll

aardvaak wrote: »

What do you mean by PTFM?

Passive target flow measurement, according to Google.

aardvaak

Thank you for all your replies