This report outlines a programme of skid resistance testing, undertaken using a SCRIM fitted with a speed-controlled water flow system, to determine if it is possible to reduce the standard nominal water depth without adversely affecting the results. It is recommended that reducing the nominal water depth from 0.5mm to 0.4mm should be implemented, subject to satisfactory testing at a SCRIM accreditation trial. (No change should be made to devices not fitted with the speedcontrolled water system.) This change would reduce water usage during surveys and reduce the fuel use and travelling time associated with water refills. As a result, survey costs could be reduced.

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