I didn't have access to the full article (behind a paywall) but I wonder if the issue was due to the language they used which caused the message to be confusing

I didn't have access to the full article (behind a paywall) but I wonder if the issue was due to the language they used which caused the message to be confusing and therefore use up the driver's focus to figure out what it meant or that this type of messaging is actually negative (fear, etc leads to worse reflexes?).