Well yes and no. Roy Weaver was a track crew supervisor and he was clearing debris from the track when he was struck. He was doing his job. Whether or not he was doing it at the appropriate time is the question. (Apparently the race officials didn't call a caution before he stepped on the track--or if they did then the drivers didn't get the message.)
Also, Linda Weaver is only suing for $75,000--a very conservative amount considering that Roy Weaver was the sole breadwinner for their family.
That maybe just for medical expenses. The lawyer is going to make sure to ask for an astronomical amount in pain and suffering, so he/she can skim off the 40% contingency fee.
Oh, I didn't hear the amount. Yes that is a very low sum per the usual suit. Of course the jury can decide to award more depending on the facts of the case.