Marty Williams recalls the conversations he and his wife would have with their two daughters about the dangers of talking and texting while driving.
?It?s always a concern,? said Williams, who lives in Howard County. ?We just drilled it into their heads over and over until they said ?Okay, we get it,? and when we saw something [about the dangers of drivers texting] on TV we made sure they saw it, too.?
Parents like Williams have good reason to worry.
Half of teens say they talk on a cellphone while driving, a third say they swap text messages, and…