The judge met with Millstone Township's prosecutor and Smith's three lawyers in chambers for about 30 minutes Tuesday. The prosecutor wouldn't discuss specifics and Smith's lawyers declined comment.
The traffic charges stem from a 2007 accident in which police say the SUV Smith was driving ran a stop sign and collided with a car. His passenger suffered severe head injuries and died two days later.
A grand jury declined to indict Smith on any charges.
Smith is accused of improper passing, failure to stop, speeding, reckless driving and failure to wear a seat belt.
The judge set the next hearing date for May 19.