Eideard

These are the guys passing the laws

For decades, automakers have been on a quest to make cars quieter: an auto that purrs, and glides almost silently in traffic.

They have finally succeeded. Plug-in hybrid and electric cars, it turns out, not only reduce air pollution, they cut noise pollution as well with their whisper-quiet motors. But that has created a different problem. They aren’t noisy enough.

So safety experts, worried that hybrids pose a threat if pedestrians, children and others can’t hear them approaching, want automakers to supply some digitally enhanced vroom. Indeed, just as cellphones have ring tones, “car tones” may not be far behind — an option for owners of electric vehicles to choose the sound their cars emit.

“One possibility is choosing your own noise,” said Nathalie Bauters, a spokeswoman for BMW’s Mini division, who added that such technology could be added to one of BMW’s electric vehicles in the future.

The notion that battery E.V.’s and plug-in hybrids might be too quiet has gained backing in Congress, among federal regulators and on the Internet. The Pedestrian Safety Enhancement Act of 2009, introduced early this year, would require a federal safety standard to protect pedestrians from ultra-quiet cars.

Rolls-Royce used to advertise that “When one of our cars passes by the only sound you hear is from the tyres – because we don’t make tyres.”

On the other – I admit I already have stepped out in front of a Lexus RX400h in a supermarket parking lot. Scared the bejeebus out of myself. The only noise was the sound of his tyres. And he was too polite to blow the damned horn.