These opinions, presented in a Harris Interactive released Wednesday, come as automakers are seeing increased driver demand for digital technology and are adding more of it to their vehicles.

More than three out of four (76 percent) of the survey's 2,634 respondents answered that in-car connectivity causes too much distraction and is dangerous to have in vehicles. Automakers have gone too far in including this technology in their vehicles, according to 55 percent of those surveyed. U.S. drivers tend to attach strong emotions to their vehicles, and the poll reinforced that view, with 61 percent of people saying their car is "a haven from the outside world" and they don't always need an outside connection.

The auto industry said it understands the technology's potential safety risks and incorporates it in a way that creates the fewest disruptions. Integrating a smartphone into a car reduces the distractions that would be present if the phone was simply placed in the passenger seat, said Wade Newton, director of communications for the Alliance of Automobile Manufacturers (AAM), an automotive trade group whose 12 members include Ford, Mazda, Toyota and General Motors.

"If the phone rings you have to reach over, grab it and see who's calling," he said. "If it is integrated, with one button they can accept the call, turn down the radio and open the speakers."

Integrated mobile phone use was an early example of in-car connectivity. Now the technology can turn vehicles into wireless hotspots, allow people to search the Web from dashboard touchscreens and connect to roadside assistance services by pressing a button.