In the UK, a set of technical fixes is already making life harder for car thieves. The pattern of vehicle crime has changed, says Martyn Randall, a security expert. He says it would only take him a few minutes to teach a person how to steal a car, using a bare minimum of tools. But only if the car is more than 10 years old.

　　Modern cars are far tougher to steal, as their engine management computer wont allow them to start unless they receive a unique ID code beamed out by the ignition key. In the UK, technologies like this have helped achieve a 31% drop in vehicle-related crime since 1997.

　　But determined criminals are still managing to find other ways to steal cars, often by getting bold of the owners keys. And key theft is responsible for 40% of the thefts of vehicles fitted with a tracking system.

　　If the car travels 100 metres without the driver confirming their ID, the system will send a signal to an operations centre that it has been stolen. The hundred metres minimum avoids false alarms due to inaccuracies in the GPS signal.

　　Staff at the centre will then contact the owner to confirm that the car really is missing, and keep police informed of the vehicles movements via the cars GPS unit.

　　31. Whats the function of the remote immobilizer fitted to a car?

　　A) To help the police make a surprise attack on the car thief.

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