Drivers on the New Jersey Turnpike who came upon the crash involving Tracy Morgan described a "terrible accident" in newly released 911 calls.

Limo driver on top of flipped over limo bus on the New Jersey Turnpike following accident involving Tracy Morgan (TMZ screen shot)

Most callers calmly gave the location of the accident but all described the same flipped over limo bus and Wal-mart truck. "It's a terrible accident. The car flipped. It's on its side," one caller told a 911 dispatcher as she passed the scene on the northbound Turnpike in Cranbury early Saturday morning according to CBS New York

Trucker Kevin Roper is charged with with death by auto and four counts of assault by auto. The Middlesex County Prosecutor's Office released the complaint against Roper on Monday revealing that the Jonesboro, Georgia man had been awake for 24 hours prior to the accident.

Walmart said it believed Roper was operating within federal regulations. "Safety is the absolute highest priority for Walmart," it said in an emailed statement.

Federal regulations permit truck drivers to work up to 14 hours a day, with a maximum of 11 hours behind the wheel. Drivers must have at least 10 hours off between work shifts to sleep.

Under New Jersey's "Maggie's Law,"  a person can be charged with assault by auto if he or she causes injury after knowingly operating a vehicle after being awake for more than 24 hours. Carole McDonnell of Washington Township, whose daughter the law is named after, tells the South Jersey Times," I feel sad for (James McNair's) family. It's outrageous that somebody would drive under those conditions. That's why the law was created — to take people like that off the roads."

A funeral service for McNair, who performed under the name "Jimmy Mack," takes place in Peekskill, New York on Thursday.

FX issued a statement in support of Morgan's upcoming show scheduled to start filming in August. "His show will be waiting for him...The only thing we are concerned with is the health and recovery of Tracy Morgan and the victims of this tragic accident," reads the statement according to NBC 4 New York.

David Letterman on Monday night's show mentioned Morgan in his monologue, recounting the accident and wishing "Morgan and his family the best" according to the New York Post.

In a statement issued late Monday afternoon by Morgan’s publicist, Lewis Kay, the comedian “remains in critical but stable condition. His fiancée Megan is by his side.” Kay denies reports that the former “30 Rock” star’s leg has been amputated and Morgan has an “arduous” recovery ahead of him.


The Associated Press contributed to this report