Motorists in Rotterdam and Utrecht, and Friesland and Drenthe provinces will hear the sirens of approaching police, fire and ambulance sirens through their car radios over the next four weeks.

Forty emergency service vehicles have been equipped with technology which breaks into radio broadcasts in a range of 300 to 400 meters and transmits the sound of a siren instead. The Flister system has already been used on two vehicles in experiments this summer.
The experiments are necessary because cars are increasingly well insulated and often sirens are not heard until the last moment, news agency ANP reports.