"I think I've explained earlier on in the year that I kind of underestimated how important experience was in this series, especially when you're up against such good quality drivers"

Dan Wheldon is referring to the value of experience in a racing series. He acknowledges that he underestimated the significance of experience when contending against experienced motorists. He is likely describing the truth that experienced motorists have a much better understanding of the track, the automobile, and the competition. They are able to expect the moves of their opponents and make the necessary modifications to their driving style to acquire a benefit. Experienced motorists also have a better understanding of the guidelines and guidelines of the series, which can give them an edge over less experienced chauffeurs. Dan Wheldon is stressing the value of experience in a racing series and how it can offer motorists an advantage over their challengers.