Tracy Morgan showing signs of improvement

NEW BRUNSWICK, N.J. (KABC) -- Comedian Tracy Morgan is showing signs of improvement after a car accident last Saturday left him in critical condition.

His spokesman, Lewis Kay, said Morgan remains hospitalized in critical but stable condition.

"His medical team remains optimistic that his recovery is progressing," Kay said in a statement.

Morgan suffered broken ribs and a broken leg from the crash on the New Jersey Turnpike. The accident killed fellow comedian James McNair and injured two other people in Morgan's limo bus.

Kevin Roper, the Wal-Mart driver who allegedly hit the limo bus, pleaded not guilty to death by auto and assault by auto charges. A criminal complaint alleges Roper hadn't slept for more than 24 hours before the accident when he swerved to avoid slowed traffic on the turnpike and plowed into Morgan's limo.

The Associated Press contributed to this report.