Car speed-limiter system trialled

An intelligent speed adaptation (ISA) system that could cut traffic accidents by preventing cars exceeding the limit has been trialled by the Department for Transport (DfT).

It takes three forms: advisory, which only warns the driver; voluntary, where the driver allows the car to take over; and mandatory, where the system overrides the driver.

The DfT has said it will now work with with vehicle manufacturers, local authorities and insurance companies to consider the future availability of the technology.

It found ISA had the potential to reduce the number of deaths and injuries on the roads "and so confirmed the department's view that it could be a useful road safety feature for drivers who wish to use it".

It said: "We are clear that any future use of ISA is taken forward by the motoring industry in response to consumer demand, just as with other technologies available for consumers to purchase if they so choose."

Participants in the trial said that, in most conditions, driving with ISA was safer, but they felt at increased risk when overtaking or driving in fast-moving traffic.

A total of 54% of participants would have ISA installed in their vehicles if its use was voluntary and did not cost more than around £100.

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