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There were reports from several drivers that over the final 15 laps, down the front straight of the Indianapolis Motor Speedway road course – and in the last sequence of corners – standing water was causing major vision issues. In particular toward Turn 1, certain drivers reported having to use the braking markers at the side of the track to gauge where they were on the track as they couldn’t see directly ahead.
While this might be expected in a wet race for any type of vehicle, water was described as pooling or bubbling around the central wicker which extends the length of the nose and up the middle of the screen.
At the time, feedback from drivers was inconsistent, since some had run with anti-drip rails at the top of the screen, some were utilizing the tear-offs and some were not. Further investigation since has narrowed down …