text: The person themselves also plays a big role in the use of cellphones in the car. The person could be a maniac when it comes down to how they use their phone, some people can't even live without it because they are so connected to it, for those specific people who have those kinds of issues when it comes down using their phones they should not be able to use their phone at all because they would then get distracted by the other uses. The amount of sheer will they would need to not get distracted by those other things would be entirely on them but in the mean time they should have no reason to use their phone.