DETROIT (AP) – Automakers are warning that drivers will switch from using distracting devices built into car dashboards to using even more distracting hand-held devices unless the government addresses both issues at the same time.

The National Highway Traffic Safety Administration heard from automakers at a public hearing Monday.

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Last month NHTSA proposed voluntary guidelines calling on automakers to include technology that automatically disables built-in phone calling, texting and other distracting devices unless the car is parked.

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Car companies say consumers will find other ways to use technologies if they can’t use built-in devices.

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