NEW PRODUCTS
Legal speed limits versus safe speeds: the need for progressive measures
QUARTIX is redefi ning speed limits to improve fl eet safety with unique research that received the Queen’s Award for Innovation.
The majority of UK road deaths happen on rural roads despite the relatively low volume of traffi c they carry. Accidents on these rural roads often occur at speeds below the National Speed Limit, which raises the question of what a safe speed really is and how we can defi ne it for each road.
Safe speeds: How far below the legal limit?
Average free‐fl ow vehicle speeds on rural roads are distinctively lower than the speed limit. However, the appropriate speed for any given road depends on its context, surface, contour, conditions and time of day. Adherence to speed limits is not a sufficient reflection of a driver’s safety, particularly on rural roads where data shows a disproportionate rate of fatal
accidents at speeds well within the legal limit.
The importance of mean traffi c fl ow
Evidence suggests a driver’s risk of suffering an accident increases exponentially as they deviate above the mean speed of moving vehicles on a specifi c stretch of road. Our SafeSpeed Database analyses
Managing Director, Quartix
that mean speed to determine a more appropriate limit that is ‘safe’. We collect over 30 million data points each day from 100,000 experienced drivers and then match them against more than two million sections of the UK road network. This allows us to define mean speeds and offer a greater measure of risk, enabling managers to encourage safer driving behaviour.
Improving safety metrics
The system we provide is simple. A green score is awarded for any speed below the mean and speeds ranking above 75% are marked in red and identified as dangerous. Our customers have found that using this insight reduces the number of accidents by 5-20%, reduces liability and costs of accidents by 10%, and reduces fuel costs by 10-25%.
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@SkipHireMag SHWM January, 2019 31
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