Two sisters were standing on the yellow line in the middle of Greenfield Road waiting for traffic to clear when they were struck from behind by a van driven by D. One of the sisters was killed, and the other was injured. The accident occurred at approximately 3:00 p.m. on February 3, 1995, as the deceased was on her way home from school. The sole witness testified that the van was traveling at a speed of approximately fifty to fifty-five miles an hour when it struck the two sisters. The posted speed limit was thirty-five miles an hour. D was convicted of involuntary manslaughter and on appeals argues that this evidence was insufficient to show that he was driving in a grossly negligent manner at the time that he struck the decedent.