Initial media reports stated Diana's car had collided with the pillar at , and that the speedometer's needle had jammed at that position; it was later announced that the car's speed upon collision was , more than twice as fast as the speed limit of . In 1999, a French investigation concluded the Mercedes had come into contact with another vehicle (a white Fiat Uno) in the tunnel. The driver of the Fiat was never conclusively traced, although many believed the driver was Le Van Thanh. The specific vehicle was not identified.