Truvelo Combi is a

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manufactured by the

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. It is bounded to the south by of coastline that stretch along the Atlantic Ocean, South Atlantic and Indian Oceans; to the ...

n company

Truvelo Manufacturers (Pty) Ltd Truvelo Armoury is a South African firearms manufacturer. It is a division of Truvelo Specialised Manufacturing (Pty) Ltd. Based in Midrand (Johannesburg) the company produces a range of rifles and other small arms for military, law enforcement and ...

. It was approved in 1999.

Background

The Truvelo camera is usually a front-facing camera (it can also be rear-facing) taking pictures using a flash gun fitted with a

magenta Magenta () is a color that is variously defined as pinkish- purplish- red, reddish-purplish-pink or mauvish-crimson. On color wheels of the RGB (additive) and CMY (subtractive) color models, it is located exactly midway between red and blu ...

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(the driver is less likely to be dazzled by the flash light). The reflected light provides the film with the correct exposure resulting in a clear picture of the driver committing the offence (considered as incriminating evidence).

Piezo-electric Piezoelectricity (, ) is the electric charge that accumulates in certain solid materials—such as crystals, certain ceramics, and biological matter such as bone, DNA, and various proteins—in response to applied mechanical stress. The word ''p ...

road strips, a known distance apart (1.53 cm from 1 - 3, 2 - 4) are set into the road in front of the camera, and the time between compressions is measured using an impededance converter and two clocks in the camera to give the resulting speed of the vehicle. The system takes a single photograph (front-facing only, two for rear photography) and uses the time from the clocks to calculate the resulting speed. The photograph of the offending vehicle will show its front tyres on the three narrowly spaced white lines across the carriageway (known as a Secondary Speed Check Lines), the middle line is 1.8 m from the last sensor, the first and third are 18 cm either side of the middle line = 10% which are present at all Truvelo installations. This is to identify the offending vehicle when it is travelling alongside a non-offending one. For front-facing photography there are two sets of Piezo sensors that are linked as 1 - 3 and 2 - 4 in the road for Truvelo camera, both taking independent readings, if the two do not match (±2 mph) the offence is discarded.{{cite web , last =Truvelo UK , title =Speed Measurement , url =http://www.truvelouk.com/speedmeasurement.phtml , accessdate =2007-06-03 , archiveurl = https://web.archive.org/web/20070602155108/http://www.truvelouk.com/speedmeasurement.phtml , archivedate = 2007-06-02

Photographic evidence

In the United Kingdom, the single incriminating photograph will not be sent unless the car owner asks for it – a Home Office ruling aimed at avoiding embarrassing situations if a driver is photographed with someone they would prefer not to be seen with. Not all Safety Camera Partnerships will disclose picture evidence. Some will only issue copies of the original photos once a summons for court has been issued, and there is a need to comply with disclosure rules.

References

External links

Truvelo Manufacturers official website

Truvelo UK subsidiary official website
Speed camera types used in the United Kingdom 1999 establishments in the United Kingdom Cameras introduced in 1999

Background

Photographic evidence

See also

References

External links