(NEWSER) – Tracy Morgan is still in critical condition after the six-vehicle crash that left one person dead Saturday, but the actor and comedian was "more responsive" yesterday, his rep said in a statement, calling it "an incredibly encouraging sign." Morgan, 45, suffered injuries including a broken leg, a broken femur, a broken nose, and broken ribs; he had surgery on his leg yesterday. He'll likely remain in a New Jersey hospital for "several weeks," the statement says. Meanwhile, authorities revealed today that Kevin Roper, the Walmart truck driver who hit Morgan's chauffeured SUV limousine, hadn't slept for more than 24 hours before the accident, the New York Post reports.