but teran wooldrich has seen tragic results.nage sisters jade and brianna were killed on a texas highway in march. they were in the back seat of this car when the teen driver looked at her phone's gps and steered into an oncoming 18 wheeler. what is it like to get that phone call? >> well, we were at friends' house. my father called. we were basically in disbelief. we were in shock. >> reporter: aaa says 60% of teen crashes involve distraction, and the number of deaths increases significantly during the summer months. aaa calls it the 100 deadliest days, starting on memorial day. during that time, more than 1,000 people die in crashes involving teen drivers. 16% more than other days of the year. >> very important for parents to be mindful of this during that period of time and to really be involved in the teen's life during that time. >> reporter: wooldrich shared a message with teens at his sisters' funeral. >> this device also can only take a moment, and your life can be changed. >> reporter: he hopes to keep other families fr