That incident involving a young driver swerving into the path of a tractor trailer on the Chesapeake Bay Bridge, took the life of the truck's driver when he swerved to avoid colliding with the car and this took him off the bridge into the bay. http://www.maryland-law.com/blog/bay-bridge-tractor-trailer-crash-breeds-lawsuit.cfm
The N.T.S.B. used radar to determine that there were voids in concrete barriers on the bridge which allowed them to collect moisture which in turn corroded bolts holding the barriers together. Since this deadly truck crash the barriers have been reinforced.