NEW PROVIDENCE, NJ - Thursday at approximately 1:55 p.m., a one-car fatal motor vehicle accident occurred on Mountain Avenue, approximately 300 yards west of South St.  The vehicle which was travelling east bound on Mountain Avenue was occupied only by the adult male  driver. Witness accounts indicate that there were no other vehicles in the area at the time of the crash. Preliminary findings indicate the 2005 Honda Accord struck the curb in the eastbound lane, left the roadway and stuck a tree. The driver is believed to have been killed upon impact.  Accident investigators from New Providence Police Department and the Union County Police Fatal Accident Team are still investigating the crash. The identity of the driver will not be released at this time pending notification to the next of kin.