The time it takes for drivers to think about stopping is more than double what it states in the Highway Code, according to a campaign group.
Road safety charity Brake is calling for stopping distances in the UK Highway Code to be increased.
They asked TRL (Transport Research Laboratory) to provide evidence on the time taken by car drivers to perceive, recognise and react to emergency situations. TRL concluded that the average thinking time is 1.5 seconds − more than double the 0.67 seconds set out in the Highway Code.
This means that average total stopping distance − including thinking and braking distance − is an extra 2.75 car lengths (11 metres) at 30mph and an extra 3.75 car lengths (15 metres) at 40mph compared with the distances used in the Code. This difference rises to an additional 6.25 car lengths (25 metres) at 70mph.
Jason Wakeford, spokesman for Brake, the road safety charity, said: "These figures suggest stopping distances taught to new drivers in the Highway Code fall woefully short. Even though car braking technology has improved in recent years, the majority of the overall stopping distance at most speeds is actually made up of the time taken to perceive the hazard and react.
"The research shows that average thinking time is more than double that set out in the Highway Code. A true understanding of how long it takes to stop a car in an emergency is one of the most important lessons for new drivers. Understanding true average thinking time reminds all drivers how far their car will travel before they begin to brake − as well as highlighting how any distraction in the car which extends this time, like using a mobile phone, could prove fatal.
"Brake is calling on the Government to increase the stopping distances in the Highway Code as a matter of urgency."
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