Let's consider these factors:
1) it was nighttime, and with the lights on that dirt track it's harder to see the contrast between light and dark objects. Because Ward was wearing a nearly black-color racing suit, that would have made seeing him on the track very difficult.
2) Ward should never have gone to the center of the track even with a full-track yellow. The fact another driver nearly hit him before the collision showed Ward was already in a highly dangerous situation and he ran the risk of being run over by someone else on the track anyway.
Ward should have gotten off the track as soon as the accident happened and settled his dispute with Stewart after the race, even if it came to fisticuffs. If that happened, Stewart would have been admonished by NASCAR officials and we'd all written off this incident as another case of "that's racin'."
Stop using Reason! Isn’t it obvious that Tony Zimmerman purposely murdered Treyvon Ward?