DALLAS - A deadly and bizarre multiple-vehicle accident Wednesday in downtown Dallas has two families grieving.

Twenty-year-old Ashley Parra was driving on Continental Avenue when she was killed after an 18-wheeler fell onto her car as it dove off the Woodall Rogers Freeway ramp that leads to Interstate 35. The driver of the truck, David Simonellis of Bedford, was thrown from the vehicle and also died.

Authorities said it appeared the truck's load, a large amount of metal pipe stems, may have shifted and led to the deadly accident.

A waitress at Hooters, Parra was only a half mile from her work when the truck drove off the ramp.

"She was a just a good kid," said Susan Castro, Ashley's grandmother who raised the University of North Texas student since she was 9-years-old. "If she said she was going to be somewhere, that's where she was going to be."

Castro said Parra's reiable nature was the reason she began to grow concerned when she heard Parra had not shown up to work.

"I can't believe it," she said. "It's so hard to believe. I just saw her yesterday."

Castro said Parra drove the same route to work everyday.

Parra was in her first semester at UNT and was studying to become a teacher. Before that, her grandmother said she spent two years studying law at Southern Methodist University.

Castro said Parro loved horses, was on the school's equestrian team and had a passion for traveling.

She had also promised to take her grandmother exploring across the country.

"She had good grades," Castro said. "[She] had a lot of potential, and she was going to grow up and be somebody someday and now she's gone."

Continental Avenue remained closed late Wednesday night. Authorities said it will stay closed until all of the debris is removed and crews determine the road is safe.