. >> reporter: in january, 26-year-old charles hu was killed outside boston when a rear tire flew off this pick-up truck and struck his car. a a.a.a. foundation study found crashes between 2011 and 2013 were caused by road that where i, injuring 39,000 people. more than 500 died. >> a majority of these crashes are preventable. if drivers would take the necessary precautions to secure their load or maintain their vehicle from a.a.a. there's a good rule, if you wouldn't want to drive behind it, there is probably something wrong here. >> if you put a load and you wouldn't want a family member driving behind you, it's a good sign it's not safe. >> he had such a dynamic personality. how could that be gone from my wife? >> reporter: next week heidi coffee will mark ten years from the day her husband gavin was killed on a seattle freeway. metal shelving flew off this truck. gavin tried to avoid it. when he swerved, he was hit and deaths have been that way. heidi was seven months pregnant with their fifth child. >> i miss being a wife because that was my favorite thing, was to be his wife and

. >> reporter: in january, 26-year-old charles hu was killed outside boston when a ar tire fle off this pick-up trucknd struck his car. a a.a. fnd study found weashes between 2011 and 2013 aused by road that where i, injurin 39,00eople. more tha 500 died. >> a majority of these crashes are preventable. rive wouake the necessary prautions to sure thr loadr maintain their hicle >>ra johnson s a good rule,f you wouldn't want to drive behind it, the isbablyomet sng herewrong if you put a load and y wouldn't want a family member driving behind you, it's a good sign it's not safe. >> he had such a dynamic personality. houlth beon from my wife? coffee wilmarken yrs from the day her h killedn a seattle freeway. metal shving flew off this truck. gavin tried to avo it. en he swerved, he was hit and heidi was seven months pregnant with tir fifth cld. >> i ms being a wife because that was my favite thing, was to be his wife and best friend. and that's what i miss. >> reporter: these accidents are most common on highways and during the middle ofhe day. scott, in all 50 states drivers can face fes if

. >> reporter: in january, charles hu was killed outside boston.riple-a study found more than 200,000 crashes were caused by road debris. injuring 39,000 people, more than 500 died. >> majority of these crashes are preventible if they would take necessary precautions to secure their load. >> reporter: if you wouldn't want to drive behind it, there's probably something wrong here? >> if you wouldn't want a family member riding behind you, it's generally not safe. >> reporter: next week, heidi coffee will mark 10 years since the day her husband gavin was killed on a seattle freeway. gavin tried to avoid it when he swerved, he was hit and killed by another car. triple-a found 27% of road debris deaths happen that way. she was pregnant with their fifth child. >> i miss being a wife because that was my favorite thing was to be his wife and best friend and that's what i miss the most. >> reporter: these accidents are most common on highways and during the middle of it day. in all 50 states, drivers can face fines if they're responsible for road debris. i

. >> reporter: in january, 26-year-old charles hu was flew off the pick up truck and hit his car. over 200,000 crashes were caused by road debris, injuring 39,000 people, more than 500 died. >> if they would take the necessary precautions to secure their load or maintain their vehicle properly. >> reporter: if you wouldaboutant want to drive something wrong? >> if you wouldn't want a family member driving behind you, probably a good sign it's not safe. >> reporter: next week, heidi coffee will mark 10 years since the day her husband, gavin was killed on a seattle freeway. metal shevling fell off a truck, when he swerved to avoid it, he was hit by another car. 37% of road that way. she was pregnant with their fifth child. >> i miss being a wife because that was my favorite thing was to be his wife and best friend and that's what i miss the most. >> reporter: these accidents are most common in highways and they can face fines, particularly if it results in an accident, in 16 states, they can face jail time. against the man who climbed trump tower. ha, no, i switched to geico and got