FOI release

Speedmeter Type Approval - Lastec local video system

We have a received a request under the Freedom of Information Act 2000 for the following: “I understand the Freedom of Information Act 2000…

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We have a received a request under the Freedom of Information Act 2000 for the following:

“I understand the Freedom of Information Act 2000 allows members of the public to request information. My request refers to the work of the HOSD Branch, specifically Type Approval on the LTI 20-20 TS/M Speedscope device and Lastec local video system (1998).
There are four questions to which I request a reply (I have studied the HO and HOSD websites and carried out searches without finding the relevant information.
1. Did Type Approval testing of information from the manufacturer take into account the possibility of laser pulses returning to the LTI 20-20 TS/M Speedscope following reflection from more than one surface in sequence and can the LTI 20-20 TS/M Speedscope detect this has occurred?
2. Did Type Approval testing of information from the manufacturer take into account the behaviour of laser pulses returning to the LTI 20-20 TS/M Speedscope from a reflective surface which is at an angle other than perpendicular to the line of transmitted laser pulses striking that surface?
3. Did Type Approval testing of information from the manufacturer take into account the combined effects of both 1 and 2 above?
4. Did Type Approval testing of information from the manufacturer take into account the possibility of laser pulses returning to the LTI 20-20 TS/M Speedscope from a direction marginally different to that indicated by the cross hairs recorded by the Lastec local video system (1998), possibly as a result of 1, 2 or 3 above, and can the Lastec local video system detect that this has occurred?
It would be advantageous, and may save public funds, if this information could be provided within twenty days. Thank you for your assistance.”
We released the following information on 21 May 2007.