Speaking to reporters, Cuomo said it remains unclear whether driver error or vehicle malfunction led to the crash, which is being investigated by New York State Police and the National Transportation Safety Board.
Investigators also will be looking into "human performance" - the driver's history and qualifications, conducting toxicology tests and determining whether fatigue was a factor, he said.
Before the limousine crashed, one of the victims, Erin McGowan, texted a friend that the limousine appeared to have engine trouble, the New York Times reported: "The motor is making everyone deaf", she said. Their names were Abigail Jackson, Mary Dyson, Allison King and Amy.
"She was a lovely, sweet soul; he was, too, they were very sweet", Abeling said. "This is the most deadly transportation accident in this country since February of 2009".
"He was just a wonderful, joyful man, who cared very much for his family and would do just about all he could for any friend or family member".
The crash "sounded like an explosion", said Linda Riley, who was on a shopping trip with her sisters and had been in their parked auto at the time at the store.
"Today is really our first full day of boots on the ground [investigations]", Sumwalt told "Good Morning America" Monday according to ABC News. "They had their whole lives ahead of them", she said.
Vertucci, who grew up in Amsterdam, New York, was an administrative assistant at St. Mary's Healthcare in Amsterdam, Abeling said.
"This may be a small city, but we are a huge city with a huge heart and just like the sign says, we are 'Amsterdam Strong.' Right now it's hard to bear what we have to bear, but we will get through it. It's in a place where I've never felt this type of pain before", Karina said as she visited the crash site Monday.
The NTSB is investigating the crash and will look at safety regulations for limousines, whose passengers are not required to wear seat belts.
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Douglas' face grew increasingly somber as she thought of her nieces' three children.
"They were attractive girls, full of life". There it struck and killed two pedestrians, and slammed into an unoccupied Toyota Highlander, before landing in the woods. We are crushed with you, we are crushed for you, [overcome] with sadness, grief, but know that we care. An older vehicle like the 2001 Excursion stretch limo did not have side-impact or curtain airbags from the factory, so you can bet there were no airbags for any of the passengers in this horrific crash, either.
A memorial gathering was planned for Monday evening in Amsterdam, New York, where some of the victims lived.
Amanda, 26, a waitress at a retirement community, was "a very strong and independent person" who didn't like people to do things for her, according to her sister.
Calls to the families of the other victims were not returned, and The Washington Post is withholding their names until their identities can be confirmed by relatives.
Schoharie Town Supervisor Alan Tavenner said Saturday that these efforts may well have been for naught, with the intersection still being highly unsafe, as exhibited by the weekend's tragedy.
"That is being analyzed for post-crash data", New York State Police Commander Major Robert Patnaude said.
"We're also in possession of the airbag control module, what would be considered the vehicle's black box".
"There's a bit of a Frankenstein approach, where a vehicle is chopped up and put back together with parts that were not originally designed for that vehicle", said Deborah Hersman, president of the National Safety Council advocacy group and a former NTSB chair.
Since the reconstruction, three tractor-trailers have run through the same stop sign authorities said the limo blew and into a field behind her business, she said. "Our ultimate goal is to keep things like this from happening again".