In thisfile photo, Tracy Morgan attends Comedy Central’s ’Night Of Too Many Stars: An Overbooked Concert For Autism Education’ at the
In thisfile photo, Tracy Morgan attends Comedy Central's 'Night Of Too Many Stars: An Overbooked Concert For Autism Education' at the Beacon Theatre in New York. Morgan is in critical condition at a hospital in New Brunswick, N.J. (AP Photo/Charles Sykes, File)

TRENTON, N.J. -- Tracy Morgan is recovering but is expected to remain hospitalized for several weeks after having surgery on a broken leg suffered in a chain-reaction crash on the New Jersey Turnpike that left two others critically injured and one dead.

The 45-year-old actor and comedian, a former "Saturday Night Live" and "30 Rock" cast member, remained in critical condition early Monday. Morgan's spokesman, Lewis Kay, said he was "more responsive" Sunday after having surgery for a broken leg.

Kay said Morgan also suffered a broken femur, a broken nose and several broken ribs and is expected to remain hospitalized for several weeks. He said Morgan's family is "tremendously overwhelmed and appreciative of the outpouring of love and support from his fans."

A Wal-Mart truck driver from Georgia was charged with death by auto and four counts of assault by auto. Authorities said 35-year-old Kevin Roper, of Jonesboro, apparently failed to slow for traffic ahead early Saturday in Cranbury Township and swerved at the last minute to avoid a crash. Instead, his big rig smashed into the back of Morgan's chauffeured Mercedes limo bus, killing comedian James "Jimmy Mack" McNair, authorities said.

A court appearance for Roper is expected sometime Monday.

Also critically injured were Morgan's assistant, Jeffrey Millea, 36, of Shelton, Connecticut, and comedian Ardie Fuqua Jr., 43, of Jersey City. They remained in critical condition Sunday evening, said Zenaida Mendez, a spokeswoman for Robert Wood Johnson Hospital in New Brunswick. Another passenger, comic Harris Stanton, was treated and released.

Tyrone Gale, who was driving the limo bus, told ABC News that he was disoriented after the vehicle flipped over and could hear Morgan yelling for help.

"I climbed around and heard Tracy screaming for help," Gale said. "I climbed up on the body of the limo bus ... but I couldn't reach them."

Roper, accompanied by his attorney, turned himself in to state police. He was released on $50,000 bail Saturday night and has been placed on administrative leave, Wal-Mart spokesman David Tovar said Sunday.