Under the terms of the settlement, Allstate, the insurer of the driver of the minivan, William C. Morris, will pay policy limits of $15,000.
Carolina Casualty, the insurer for David Mulligan, the driver of the tractor-trailer, agreed to pay $435,000 from a policy that had a limit of $1 million. With the settlement, neither Morris nor Mulligan admit any wrongdoing.
Voltz's lawyer, Alan Natalie, will receive $150,000 to cover his costs and a 33 percent fee.
Out of the remaining proceeds, $10,000 will be placed in a special needs trust for Voltz to support her vocational training, according to court records.
An additional $290,000 will be placed in a structured settlement that will provide monthly payments of $1,307 to support Voltz.
The settlement agreement bars all parties from commenting on the case.
Voltz's family, however, blogged online for several months about her long recovery efforts. Hundreds followed their reports of her long stay in the intensive care unit and her success at recovering movement and speech through rehabilitation.
The family stopped posting updates in 2008.
Voltz lives with her parents and relies on them for economic support and some physical support, according to court records.
The accident happened about 1:43 a.m.
State police at Lawrence Park said Voltz was one of two passengers in a 1999 Dodge Caravan that hit a tractor-trailer. Voltz was not wearing a seat belt, police said.
The collision caused her to be ejected from the van's sliding rear door.
The two other people in the minivan suffered minor injuries, police said. The driver, Morris, then 18, and another passenger, Anastasia N. Burchick, then 19, were wearing seat belts, police said.
The truck driver, Mulligan, then 47, was also wearing a seat belt and was not injured. Mulligan had the right-of-way in the intersection, according to court records.
Police said the minivan was northbound on Nagle Road when it hit the rig, which was eastbound on Iroquois Avenue.