Paula Reid was cruising at the speed limit on U.S. 460 in Virginia, near Montvale, her big BMW sedan slicing through the dark highway’s miles. Then, thwack. "Out of nowhere she hit me,’’ Reid, 49, of Roanoke said of the doe that darted across two oncoming lanes of traffic and the median before crashing into her car. "They are everywhere, and you never know when they will hit.’’